Merge pull request #328 from biswajitdas-007/javascript

String methods added

backend/laravel.php

@@ -8,6 +8,8 @@
 // MAIN.
 
 php artisan clear-compiled       // Remove the compiled class file
+php artisan db                   // Start a new database CLI session
+php artisan docs                 // Access the Laravel documentation
 php artisan down                 // Put the application into maintenance mode
 php artisan dump-server          // Start the dump server to collect dump information.
 php artisan env                  // Display the current framework environment
@@ -43,6 +45,9 @@ php artisan config:clear         // Remove the configuration cache file
 // DB
 
 php artisan db:seed              // Seed the database with records
+php artisan db:show              // Display information about the given database
+php artisan db:table             // Display information about the given database table
+php artisan db:wipe              // Drop all tables, views, and types
 
 // EVENT
 
@@ -54,9 +59,10 @@ php artisan key:generate         // Set the application key
 
 // MAKE
 
-php artisan make:auth            // Scaffold basic login and registration views and routes
+php artisan make:cast            // Create a new custom Eloquent cast class
 php artisan make:channel         // Create a new channel class
 php artisan make:command         // Create a new Artisan command
+php artisan make:component       // Create a new view component class
 php artisan make:controller      // Create a new controller class
 php artisan make:event           // Create a new event class
 php artisan make:exception       // Create a new custom exception class
@@ -74,6 +80,7 @@ php artisan make:provider        // Create a new service provider class
 php artisan make:request         // Create a new form request class
 php artisan make:resource        // Create a new resource
 php artisan make:rule            // Create a new validation rule
+php artisan make:scope           // Create a new scope class
 php artisan make:seeder          // Create a new seeder class
 php artisan make:test            // Create a new test class
 
@@ -86,6 +93,10 @@ php artisan migrate:reset        // Rollback all database migrations
 php artisan migrate:rollback     // Rollback the last database migration
 php artisan migrate:status       // Show the status of each migration
 
+// MODEL
+php artisan model:prune          // Prune models that are no longer needed
+php artisan model:show           // Show information about an Eloquent model
+
 // NOTIFICATIONS
 
 php artisan notifications:table  // Create a migration for the notifications table
@@ -100,13 +111,19 @@ php artisan package:discover     // Rebuild the cached package manifest
 
 // QUEUE
 
+php artisan queue:batches-table  // Create a migration for the batches database table
+php artisan queue:clear          // Delete all of the jobs from the specified queue
 php artisan queue:failed         // List all of the failed queue jobs
 php artisan queue:failed-table   // Create a migration for the failed queue jobs database table
 php artisan queue:flush          // Flush all of the failed queue jobs
 php artisan queue:forget         // Delete a failed queue job
 php artisan queue:listen         // Listen to a given queue
+php artisan queue:monitor        // Monitor the size of the specified queues
+php artisan queue:prune-batches  // Prune stale entries from the batches database
+php artisan queue:prune-failed   // Prune stale entries from the failed jobs table
 php artisan queue:restart        // Restart queue worker daemons after their current job
 php artisan queue:retry          // Retry a failed queue job
+php artisan queue:retry-batch    // Retry the failed jobs for a batch
 php artisan queue:table          // Create a migration for the queue jobs database table
 php artisan queue:work           // Start processing jobs on the queue as a daemon
 
@@ -116,9 +133,26 @@ php artisan route:cache          // Create a route cache file for faster route r
 php artisan route:clear          // Remove the route cache file
 php artisan route:list           // List all registered routes
 
+// SAIL
+
+php artisan sail:install         // Install Laravel Sail's default Docker Compose file
+php artisan sail:publish         // Publish the Laravel Sail Docker files
+
+// SANCTUM
+
+php artisan sanctum:prune-expired // Prune tokens expired for more than specified number of hours.
+
 // SCHEDULE
 
-php artisan schedule:run         // Run the scheduled commands
+php artisan schedule:clear-cache  // Delete the cached mutex files created by scheduler
+php artisan schedule:list         // List the scheduled commands
+php artisan schedule:run          // Run the scheduled commands
+php artisan schedule:test         // Run a scheduled command
+php artisan schedule:work         // Start the schedule worker
+
+// SCHEMA
+
+php artisan schema:dump           // Dump the given database schema
 
 // SESSION
 
@@ -128,6 +162,10 @@ php artisan session:table        // Create a migration for the session database
 
 php artisan storage:link         // Create a symbolic link from "public/storage" to "storage/app/public"
 
+// STUD
+
+php artisan stub:publish         // Publish all stubs that are available for customization
+
 // VENDOR
 
 php artisan vendor:publish       // Publish any publishable assets from vendor packages

databases/mysql.sh

@@ -16,3 +16,69 @@ GRANT ALL PRIVILEGES ON prospectwith.* TO 'power'@'localhost' WITH GRANT OPTION;
 CREATE USER 'newuser'@'localhost' IDENTIFIED BY 'password'; # Create user
 
 mysql -u root -pmypassword -e "MY SQL QUERY" &>> query.log & disown # Run SQL query in the background
+
+# *****************************************************************************
+# Database and Table Operations
+# *****************************************************************************
+
+CREATE DATABASE database_name; # Create a new database
+DROP DATABASE database_name; # Delete a database
+CREATE TABLE table_name (column1 datatype, column2 datatype, ...); # Create a new table
+DROP TABLE table_name; # Delete a table
+SHOW TABLES; # Display all tables in the current database
+DESCRIBE table_name; # Show the structure of a table
+
+# *****************************************************************************
+# Data Manipulation
+# *****************************************************************************
+
+INSERT INTO table_name (column1, column2, ...) VALUES (value1, value2, ...); # Insert data into a table
+UPDATE table_name SET column1 = value1, column2 = value2, ... WHERE condition; # Update existing data in a table
+DELETE FROM table_name WHERE condition; # Delete data from a table
+SELECT column1, column2, ... FROM table_name WHERE condition; # Select data from a table
+
+# *****************************************************************************
+# Backup and Restore
+# *****************************************************************************
+
+mysqldump -u username -p database_name table1 table2 > file.sql # Backup specific tables
+mysql -u username -p database_name < file.sql # Restore specific tables
+
+# *****************************************************************************
+# User Management and Security
+# *****************************************************************************
+
+REVOKE privilege_type ON database_name.table_name FROM 'username'@'hostname'; # Revoke privileges from a user
+DROP USER 'username'@'hostname'; # Delete a user
+ALTER USER 'username'@'hostname' IDENTIFIED BY 'newpassword'; # Reset a user's password
+
+# *****************************************************************************
+# Performance and Maintenance
+# *****************************************************************************
+
+OPTIMIZE TABLE table_name; # Optimize a table
+ANALYZE TABLE table_name; # Analyze a table for key distribution and storage optimization
+CHECK TABLE table_name; # Check a table for errors
+REPAIR TABLE table_name; # Repair a corrupted table
+
+# *****************************************************************************
+# Advanced Queries
+# *****************************************************************************
+
+SELECT ... FROM table1 JOIN table2 ON table1.column = table2.column; # Perform a join operation between two tables
+SELECT ... FROM (SELECT ... FROM table_name) AS subquery; # Use a subquery within another query
+SELECT column, COUNT(*) FROM table_name GROUP BY column; # Group results and use aggregate functions
+
+# *****************************************************************************
+# System Information
+# *****************************************************************************
+
+SELECT VERSION(); # Show the current version of MySQL
+SELECT User, Host FROM mysql.user; # List all current MySQL users
+
+# *****************************************************************************
+# Miscellaneous
+# *****************************************************************************
+
+SET GLOBAL general_log = 'ON'; # Enable query logging
+SHOW FULL PROCESSLIST; # Show the last queries executed in MySQL

frontend/html5.html

@@ -185,7 +185,6 @@ width=""                                          <!-- Describes the width of th
 <!-- Some other useful tags -->
 
 <canvas></canvas>                                 <!-- Allows to draw 2D shapes on the web page with the help of javascript -->
-<keygen>                                          <!-- Represents a control for generating a public-private key pair -->
 <map></map>                                       <!-- Specifies an image map -->
 
 <!-- Collective Character Obejcts -->

languages/C#.txt

@@ -88,7 +88,7 @@ CHEATSHEET C#
     string newStr = oldStr.Replace("old","new");
 
     //IndexOf
-    //Finds the first ocurrence of a string in a larger string
+    //Finds the first occurrence of a string in a larger string
     //Returns -1 if the string is not found
     String.IndexOf(val, start, num)
     val - string to search for
@@ -102,7 +102,7 @@ CHEATSHEET C#
     String.Split(Char[]);
 
     //ToCharArray
-    //Places selected characteres in a string in a char array
+    //Places selected characters in a string in a char array
     String str = "AaBbCcDd";
     //create array of 8 vowels
     var chars = str.ToCharArray();
@@ -135,7 +135,7 @@ CHEATSHEET C#
 
     6.1 TimeSpan Constructor
 
-    TimpeSpan(hour, minute, sec)
+    TimeSpan(hour, minute, sec)
 
     TimeSpan timeS = new TimeSpan(10, 14, 50);
     TimeSpan timeS_Hours = TimeSpan.FromDays(3640);
@@ -144,8 +144,8 @@ CHEATSHEET C#
 
     Format item syntax: {index[,alignment][:format string]}
     index - Specifies element in list of values to which format is applied
-    aligment - Indicates minimun width (in characters) to display value
+    alignment - Indicates minimum width (in characters) to display value
-    format string - Contains the code which specififes the format of the displayed value
+    format string - Contains the code which specifies the format of the displayed value
 
     7.1 Numeric
 
@@ -293,7 +293,7 @@ CHEATSHEET C#
     [access modifier] className (parameters) [:initializer]
 
     initializer -base calls constructor in base class.
-                 this calls constuctor within class.
+                 this calls constructor within class.
 
     public class nameClass : Initializer {
         public className(dataType param1 , dataType param2, ...) : base(param1, param2)
@@ -313,8 +313,8 @@ CHEATSHEET C#
     abstract – must be implemented by subclass
 
     Passing parameters:
-        1. By default, parametres are passed by value
+        1. By default, parameters are passed by value
-        2. Passing by reference: ref, in and out modifers
+        2. Passing by reference: ref, in and out modifiers
 
     To pass a parameter by reference with the intent of changing the value, use the ref, or out keyword. To pass by reference with the intent of avoiding copying but not changing the value, use the in modifier
 

languages/C++.txt

@@ -1,485 +0,0 @@
-
-#DATA TYPES
- 1)void   - type with empty set of values.There is no structure assosciated with void except pointers.
-std::nullptr_t is a special pointer that is not itself a pointer type.
-
- 2) int   - stores an integer value .
-          4 bytes C++ standard since C11. (for 16-bit OS its 2 bytes)
-          Hence,int value ranges from -2147483648 to 2147483647.
-
- 3) float - stores an decimal value.
-           4 bytes .
-
- 4) char  - stores a single character value(ASCII values)
-           1 byte.(0 to 255)
-
- 5) bool  - stores a boolean value.(true or false)
-           1 byte.
-	   stores a value 0 or 1 indicating tue or false.
-	
-# MODIFIERS
-C++ has modifiers for extending the limits of the basic data types for some advanced calculation.There are 2 types of Modifiers:-
-1)Signedness
-    #  signed   - by default,target will have signed representation ,which means a variable can take negative values.
-    #  unsigned - target data type will be unsigned means only positive(absolute) values will be taken by that type.
-
-2) Size
-    #  short     - Target data type will have a width of atleast 2 bytes.The data type is optimized for lower bounds using less space.
-    #  long      - Target data type will have a width of atleast 4 bytes.
-    #  long long - Target data type will have a width of at least 8 bytes.
-
-Character Types
-
-    1) signed char 
-    2) unsigned char
-    3) char
-    4) wchar_t
-
-Float Types
-    1) float
-    2) double
-    3) long double
-    
-# DATA STRUCTURES
-1) ARRAYS
-to declare an array of any type : data_type name_of_array[size of array];
-array cannot be re-intialized with the number of elements. 
-
-2) LINKED LIST
-a linked list in cpp is built-in in the form of vectors
-to declare an vector(linked list) in cpp : vector<data_type> name;
-you have to include vector library. #include<vector>
-
-3) STACK
-to make a stack in cpp : stack<data_type> name;
-you have to include stack library .#include<stack>
-
-4) QUEUE
-to make a queue in cpp : queue<data_type> name;
-you have to include queue library .#include<queue>
-
-cout<<"Anything"<<variables<<endl;
-* This prints text on console (Console OUTput).
-cin>>x;
-* This inputs data from user and stores in specified variables.
-
-cin.getline(variable,characters in it)
-* This is specially used for white sapced (Spaces) input.
-
-
-* Declare a variable named x
-DataType    Description
-int x;      // Integer var named x
-char x;     // Character var stores one alphabet,numerics,special symbol and is one byte.
-string x;   // Characterd back to back
-bool x;     // Boolean value (1 or 0)(true or false)
-float x;    // Real values (decimal numbers)
-
-* 
-
-#KEYWORDS (reserved words ,have special functionality).There are 97 keywords in C++ as of C20 standard.
-    1)  alignas              -specifies the alignment requirement of a type or an object.
-    2)  alignof              -queries alignment requirements of a type.
-    3)  and                  -logical and operator.(alternative to &&)
-    4)  and_eq		     -bitwise and operator .(alternative to &= ,x&=y or x=x&y)
-    5)  asm		     -embed assembly code within C++ program.
-    6)  atomic_cancel        -
-    7)  atomic_commit	     -
-    8)  atomic_noexcept
-    9)	auto                 -automatic intializer or return type evaluated.
-   10)  bitand               -alternative for bitwise and. (&)
-   11)  bitor                -alternative for bitwise or. (|)
-   12)  bool                 -data type,capable of holding either true or false.
-   13)  break                -terminating statement for, loops and switch statements.
-   14)  case                 -transfer control to one of the several statements depending on the value of conditions.
-   15)  catch                -used in exception handling.
-   16)  char                 -data type character.
-   17)  char8_t              -character data type 1 byte.(UTF-8 bit character)
-   18)  char16_t	     -character data type 2 bytes.(UTF-16 bit character)
-   19)  char32_t	     -character data type 4 bytes.(UTF-32 bit character)
-   20)  class      	     -declaration of user-defined data types.
-   21)  compl 		     -compliment operator.(alternative to ~)
-   22)  concept   	     -named set of requirements.
-   23)  const		     -defines that the type is constant.
-   24)  consteval	     -specifies that a function is an immediate function.
-   25)  constexpr	     -specifies that the value of a variable or function can appear in constant expression.
-   26)  constinit	     -asserts that a variable has static intialization.
-   27)  const_cast 	     -converts between types with different cv-qualification.
-   28)  continue     	     -causes the remaining body of loops to be skipped.
-   29)  co_await	     -suspend operation until resumed.
-   30)  co_return 	     -complete execution returning a value.
-   31)  co_yield 	     -suspend execution returning a value.
-   32)  decltype	     -inspects the declared type of an entity or the type and value category of an expression.
-   33)  default		     -transfer control to one of the several statements,explicitly defaultedfunction definition.
-   34)  delete		     -destroy previously allocated objects,ill-formed functions. 
-   35)  do		     -do-while loop.(executes a statement repeatedly,until condition is false)
-   36)  double 		     -double precision floating point.
-   37)  dynamic_cast	     -safely converts pointers and references to classes along the inheritance hierarchy.
-   38)  else 		     -if the bool value of if() is false then this block gets executed.
-   39)  enum 		     -enumeration is a distinct type whose value is restricted to a range of values.
-   40)  explicit	     -specifies that a constructor or conversion function cannot be used for implicit conversions and copy initialization.
-   41)  export		     -exports all namespace-scope declaration.
-   42)  extern		     -applies the language specification for external linkages of function names,types and variables.
-   43)  false		     -a boolean literal indicating condition is not satisfied.
-   44)  float 		     -data type declaration for floating point numbers.
-   45)  for 		     -intializes counter once and iterates over and over again incrementing the counter each time ,till the condition is met.Range based for loop executes over a range.
-   46)  friend		     -a friend declaration appears in a class body to grants a function or another class access to private and protected members.
-   47)  goto		     -transfers control unconditionally.
-   48)  if		     -if the condition yields true then the block of code gets executed.
-   49)  inline		     -declares a function to be inline function .
-   50)  int 		     -basic integer data type.
-   51)  long 		     -target type will have a width of atleast 4 bytes.
-   52)  mutable		     -permits modification of class members even if they are declared const.
-   53)  namespace 	     -provide a method for preventing name conflicts in large projects.
-   54)  new		     -creates and initializes objects with dynamic storage duration.
-   55)  noexcept	     -performs a compile time check that returns true if an expression is declared not to throw exceptions.
-   56)  not		     -alternative operator for !
-   57)  not_eq	   	     -alternative operator for !=
-   58)  null_ptr	     -denotes a pointer literal.
-   59)  operator	     -customizes C++ operators for operands of user-defined data type
-   60)  or		     -alternative to | operator.
-   61)  or_eq		     -alternative to |= operator.
-   62)  private		     -member specification of class/struct or union ,define the accessibility of subsequent members.
-   63)  protected	     -member specification of class/struct or union ,define the accessibility of subsequent members and inherited members of base class.
-   64)  public 		     - member specification of class/struct or union ,define the accessibility of subsequent members to any subsequent class.
-   65)  reflexpr	     -
-   66)  register	     -automatic storage duration.
-   67)  reinterpret_cast     -converts between types by reinterpreting the underlying bit pattern.
-   68)  requires	     -used to introduce a requires-clause, which specifies constraints on template arguments or on a function declaration. 
-   69)  return 		     -terminates the current function and gives back a specified value to the caller.
-   70)  short		     -target type will be optimized for space and will have a width of 2 bytes atleast. 
-   71)  signed		     -target will have a signed representation.
-   72)  sizeof		     -used when actual size of object must be known.
-   73)  static 		     -specified variables will have static storage duration.
-   74)  static_asset	     -performs compile-time assertion check.
-   75)  static_cast	     -converts between types using a combination of implicit and user-defined conversions.
-   76)  struct		     -class with public member accessibility by default. 
-   77)  switch		     -transfer control to one of the several statements,depending on the value of condition. 
-   78)  synchronized 	     -
-   79)  template	     -template is an entity of family of either classes,functions or variables.
-   80)  this		     -a prvalue expression whose value is the address of the implicit object parameter.
-   81)  thread_local	     -thread storage duration.
-   82)  throw		     -signals and erroneous conditions and executes an error handler.
-   83)  true		     -a boolean literal indicating condition is satisfied. 
-   84)  try		     -associates one or more exception handlers with a compound statement.
-   85)  typedef		     -creates an alias that can be used anywhere in place of a type name.
-   86)  typeid		     -used where the dynamic type or polymorphic object must be known and for static type identification.
-   87)  typename	     -similar word for class.
-   88)  union		     -a special class type that can hold only one of its non-static data members at a time. 
-   89)  unsigned	     -target type will have a unsigned representation.
-   90)  using		     -introduces a name that is defines elsewhere into the declarative region .
-   91)  virtual		     -virtual functions or classes are defined using the virtual keyword.
-   92)  void		     -type with empty set of values.
-   93)  volatile  	     -defines that the type is volatile.
-   94)  wchar_t		     -type for wide character representation.
-   95)  while		     -executes statements repeatedly untill the condition becomes false.
-   96)  xor		     -alternative operator for ^
-   97)  xor_eq		     -alternative operatir for ^=
-
-#HEADER FILES
-
-   #include<files>
-*This makes the compiler aware that other files are required for the complete working of this source code.
-
-List of Header files and their respective functions in C++
-1) <cstdlib>   General purpose library.
-
-Function name      use cases                                                                  return type                  Parameters
-malloc           allocates memory                                                                 void*               1(number of bytes)
-calloc           allocates and zeroes memory                                                      void*               2(no.of obj,size of each obj)
-realloc          expands or shrinks previously allocated memory                                   void*               2(pointer to mem area allocated,new size of array)
-free             deallocates previously allocated memory                                          void                1(pointer to memory to deallocate)   
-atof             converts a byte string to floating point value                                  double               1(string)
-atoll            converts a byte string to integer value                                  int/long/long long          1(string)
-strtoull         converts a byte string to unsigned integer                                  long/long long           3(str ,str_end ,base) 
-strtold          convert a byte string to a float point value                           float/double/lonng double     2(str ,str_end)
-rand             generate pseudo-random numbers                                                    int                0 
-srand            seeds pseudo-random number generation                                             void               1(seed)
-qsort            sorts range of element with unspecified type.                                     void               4(ptr ,count ,size ,comp)
-bsearch          searches an array for an element of unspecified type.                             void*              5(key ,ptr ,count ,size ,comp)
-abs/llabs        completes absolute value of an integer value.	                           int/long/long long         1(int)
-lldiv            computes quotient and remainder of integer division                                obj               2(int,int)
-abort            abnormal program termination without cleaning up.	                           void               0
-exit             normal program termination with cleaning up.                                      void               1(exit_code)
-mblen            returns number of bytes in next multibyte characters.                              int               2(ptr ,int)
-mbtowc           converts a next multilayer character to wide characters.                           int               3(int , ptr , ptr)
-wctomb          converts a next multilayer character to wide characters.                            int               2(wide char , ptr)
-
-2) <bitset>      general utility library
-
-operator&        performs binary logic operations on bitsets.(and)
-operator|        performs binary logic operations on bitsets.(or)                                }obj                  2(lhs ,rhs)
-operator^        performs binary logic operations on bitsets.(xor)
-operator>>       performs stream output of bitsets
-operator<<       performs stream input of bitsets
-
-3) <utility>     general utility library
-
-swap             swaps the value of two objects.						 obj                   2(a ,b)
-exchange         replaces the argument with a new value and returns its previous value.          obj                   2(obj , new_obj)
-forward          forwards a function argument.							 obj                   1(obj) 
-move             obtains an rvalue refrence. 							 obj                   1(obj)
-std::get         access an element of a pair.						     refernce (ptr)            1(obj)
-operator<=>     lexicographically compares the value in pair.					boolean                2(lhs , rhs)
-in_range         checks if an integer value is in the range of a given integer type.            boolean                1(obj)
-
-cmp_equal
-cmp_not_equal
-cmp_less         } compares two integer values without value change caused by conversion.       boolean                2(u , t )
-cmp_greater
-cmp_less_equal
-cmp_greater_equal 
-
-4) <functional>  provudes standard hash functions
-
-bind_front       binds a variable number of arguments,in order,to a function object.            obj                   2(obj , args)
-bind             binds one or more arguments to a function object.                              obj                   2(obj , args)
-ref/cref         creates a std::reference_wrapper with a type deduced from its argument.        obj                   1(ptr to obj)
-invoke           invokes any callable object with given arguments.                              obj                   2(obj , args)
-
-5) <ctime>       C-style time/date utility. 
-
-clock            returns raw processor clock time since the program started.                   int (time)               0
-time             returns the current time of the system since epoch.                           obj                    1(ptr)
-difftime         computes the difference between times.                                        int (time)             2(time_begin , time_end)
-time_spec_get    returns the calender time based on a given time base.                         int                    2(ptr , base)
-
-6) <chrono>      C++ time/date utility
-
-opeartors
-+
--
-*               }implements arithmetic operations with durations as arguments.                 obj                    4(lhs , rhs , d , s)
-/
-%
-
-operators
-==
-<
->               }compares two durations.                                                       obj                   2(lhs , rhs )
-<=
->=
-<=>
-
-duration cast    converts a duration to another.                                    time duration(int ,float,etc)   1(duration time)
-floor            converts a duration to another,rounding down.                      time duration(int ,float,etc)   1(duration time)
-ceil             converts a duration to another,rounding up.                        time duration(int ,float,etc)   1(duration time)
-round            converts a duration to another,rounding to nearest,ties to even.   time duration(int ,float,etc)   1(duration time)
-abs              obtain the absolute value of the duration.                         time duration(int ,float,etc)   1(duration time)                  
-
-7) <algorithm>
-
-all_of  
-any_of           } checks for any predicate is true for elements in a range.           boolean                      4(first ,last, policy ,predicate)
-none_of
-
-for_each           applies a function to a range of elements                           obj                          4(first ,last, policy ,obj)
-for_each_n         applies a function to a range of n elements in a sequence           integer                      4(first ,last, policy ,obj)
-count              }returns the number of elements satisfying a criteria.              integer                      4(first ,last, policy ,predicate)
-count_if          
-mismatch           finds first position where two ranges differ.                       obj                          6(first1 ,last1 ,first2 ,last2 ,policy ,binary predicate)  
-find               
-find_if            }finds first element which satisfies specific criteria.             obj                          6(first, last ,policy ,valur,unary predicate,binary predicate)
-find_if          
-find_if_not
-find_end           finds the last sequence of elements in a range.                     obj                          6(first ,last ,s_first ,s_last, ppolicy ,binary predicate) 
-find_first_of      searches for any one of a set of elements.  
-adjacent_find      finds first two adjacent items that are equal.              
-search             searches for a range of elements.
-search_n           searches a range for a number of consecutive copies of an element
-  
-copy               }copies a range of elements to a new location 
-copy_if
-copy_n             copies a range of elements to a new location.
-copy_backward      copies a range of elements in backward order.
-move               moves a range of elements to a new location.
-move_backward      moves a range of elements to a new location in backward location.
-fill               copy-assigns the given value to every element in a range.
-fill_n             copy-assigns the given value to N elements in a range.
-transform          applies a function to a range of elements, storing results in a destination range.
-generate           assigns the results of successive function calls to every element in a range .   
-generate_n         assigns the results of successive function calls to N elements in a range.
-remove            }removes elements satisfying specific criteria.
-remove_if
-remove_copy       }copies a range of elements omitting those that satisfy specific criteria.
-remove_copy_if
-replace           }replaces all values satisfying specific criteria with another value.
-replace_if
-replace_copy      }copies a range, replacing elements satisfying specific criteria with another value.
-replace_copy_if
-swap              swaps the values of two objects.
-swap_ranges       swaps two ranges of elements.
-iter_swap 	  swaps the elements pointed to by two iterators.
-reverse           reverses the order of elements in a range.
-reverse_copy      creates a copy of a range that is reversed.
-rotate            rotates the order of elements in a range.
-rotate_copy       copies and rotate a range of elements.
-shift_left        }shifts elements in a range.
-shift_right   
-shuffle           }randomly re-orders elements in a range.
-random_shuffle
-sample            selects n random elements from a sequence.
-unique            removes consecutive duplicate elements in a range.
-unique_copy       creates a copy of some range of elements that contains no consecutive duplicates.
-
-is_partitioned    determines if the range is partitioned by the given predicate.
-partition         divides a range of elements into two groups.
-partition_copy    copies a range dividing the elements into two groups.
-stable_partition  divides elements into two groups while preserving their relative order.
-partition_point   locates the partition point of a partitioned range.
-
-is_sorted         }checks whether a range is sorted into ascending order.
-is_sorted_until
-sort               sorts a range into ascending order.
-partial_sort       sorts the first N elements of a range.
-partial_sirt_copy  copies and partially sorts a range of elements.
-stable_sort        sorts a range of elements while preserving order between equal elements.
-nth_element        partially sorts the given range, partitioned by the given element.
-
-lower_bound        returns an iterator to the first element not less than the given value.
-upper_bound        returns an iterator to the first element greater than a certain value.
-binary_search      determines if an element exists in a certain range.
-equal_range        returns range of elements matching a specific key.
-
-merge              merges two sorted ranges.
-inplace_merge      merges two ordered ranges in-place.
-
-includes           returns true if one sequence is a subsequence of another .           
-set_differences    computes the difference between two sets.
-set_interactions   computes the intersection of two sets.
-set_symmetric_difference       computes the symmetric difference between two sets.
-set_union          computes the union of two sets.
-
-is_heap            checks if the given range is a max heap.
-is_heap_until      finds the largest subrange that is a max heap.
-make_heap          creates a max heap out of a range of elements.
-push_heap          adds an element to a max heap.
-pop_heap           removes the largest element from a max heap.
-sort_heap          turns a max heap into a range of elements sorted in ascending order.
-
-max                returns the greater of the given values.
-max_element        returns the largest element in a range.
-min                returns the smaller of the given values.
-min_element        returns the smallest element in a range.
-minmax             returns the smaller and larger of two elements.
-minmax_element     returns the smallest and the largest elements in a range.
-clamp              clamps a value between a pair of boundary values.
-
-equal                                determines if two sets of elements are the same.
-lexicographical_compare              returns true if one range is lexicographically less than another.
-lexicographical_compare_three_way    compares two ranges using three-way comparison.
-
-is_permutation        determines if a sequence is a permutation of another sequence.
-next_permutation      generates the next greater lexicographic permutation of a range of elements.
-prev_permutation      generates the next smaller lexicographic permutation of a range of elements.
-
-range::all of the above functions in algorithm
-
-8) <cmath>
-
-abs  
-fabs                }absolute value of a floating point value.
-fabsf
-fabsl
-
-fmod
-fmodf               }remainder of the floating point division operation.
-fmodl
-
-remainder
-remainderf          }signed remainder of the division operation.
-remainderl
-
-remquo
-remquof           }signed remainder as well as the three last bits of the division operation.
-remquol
-
-fma
-fmaf              }fused multiply-add operation.
-fmal
-
-fmax
-fmaxf             }larger of two floating point values.
-fmaxl
-
-fmin
-fminf             }smaller of two floating point values.
-fminl
-
-fdim
-fdimf             }positive difference of two floating point values.
-fdiml
-
-nan
-nanf              }not-a-number (NaN).
-nanl
-
-lerp              linear interpolation function.
-
-exp expf expl            returns e raised to the given power.
-exp2 exp2f exp2l         returns 2 raised to the given power.
-expm1 expm1f expm1l      returns e raised to the given power, minus one.
-log   logf   logl        computes natural (base e) logarithm.
-log10 log10f log10l      computes common (base 10) logarithm.
-log2  log2f  log2l       base 2 logarithm of the given number.
-log1p log1pf log1pl      natural logarithm (to base e) of 1 plus the given number.
-pow   powf   powl        raises a number to the given power.
-sqrt  sqrtf  sqrtl       computes square root.
-cbrt  cbrtf  cbrtl       computes cubic root.
-hypot hypotf hypotl      computes square root of the sum of the squares of two or three given numbers.
-sin   sinf   sinl        computes sine.
-cos   cosf   cosl        computes cosine.
-tan   tanf   tanl        computes tangent.
-asin  asinf  asinl       computes arc sine.
-acos  acosf  acosl       computes arc cosine.
-atan  atanf  atanl       computes arc tangent.
-sinh  sinhf  sinhl       computes hyperbolic sine.
-cosh  coshf  coshl       computes hyperbolic cosine.
-tanh  tanhf  tanhl       computes hyperbolic tangent.
-asinh asinhf asinhl      computes the inverse hyperbolic sine.
-acosh acochf acoshl      computes the inverse hyperbolic cosine.
-atanh atanhf atanhl      computes the inverse hyperbolic tangent.
-erf   erff   erfl        error function.
-erfc  erfcf  erfcl       complementary error function.
-tgamma tgammaf tgammal   gamma function.
-lgamma lgammaf lgammal   natural logarithm of the gamma function.
-ceil   ceilf   ceill     nearest integer not less than the given value.
-floor  floorf  floorl	 nearest integer not greater than the given value.
-trunc  truncf  truncl	 nearest integer not greater in magnitude than the given value.
-round  roundf  roundl	 
-lround lroundf lroundl   } nearest integer, rounding away from zero in halfway cases..
-llround llroundf llroundl
-nearbyint nearbyintf nearbyintl    nearest integer using current rounding mode.
-
-9) <complex>
-
-operator+ 
-operator-             }applies unary operators to complex numbers.
-opeartor*              performs complex number arithmetics on two complex values or a complex and a scalar.
-operator/
-operator==
-operator!=            }compares two complex numbers or a complex and a scalar.
-operator>>            
-opeartor<<            }serializes and deserializes a complex number.
-real                   returns the real component.
-imag		       returns the imaginary component.
-abs	 	       returns the magnitude of a complex number.
-arg                    returns the phase angle.   
-norm		       returns the squared magnitude.
-conj		       returns the complex conjugate.
-proj                   returns the projection onto the Riemann sphere.
-polar                  constructs a complex number from magnitude and phase angle.
-exp		       complex base e exponential.
-log		       complex natural logarithm with the branch cuts along the negative real axis.
-log10		       complex common logarithm with the branch cuts along the negative real axis.
-pow		       complex power, one or both arguments may be a complex number.
-sqrt                   complex square root in the range of the right half-plane.
-sin   cos   tan        computes sine, cosine and tangent respectively of a complex number. 
-asin  acos  atan       computes arc sine, arc cosine and arc tangent respectively of a complex number.
-sinh  cosh  tanh       computes hyperbolic sine, hyperbolic cosine and hyperbolic tangent respectively of a complex number.
-asinh acosh atanh      computes area hyperbolic sine, area hyperbolic cosine and area hyperbolic tangent respectively of a complex number.
-operator""if
-operator""i            } A std::complex literal representing pure imaginary number.
-operator""il
-
-

languages/C.txt

@@ -149,6 +149,7 @@ Operators
   ^=   	bitwise exclusive or and store
   |=   	bitwise or and store
   ,    	separator as in   ( y=x,z=++x )
+  ;     statement terminator.
 
 
 Operator precedence

languages/bash.sh

@@ -524,14 +524,14 @@ Cyan='\033[0;36m'   # Cyan
 White='\033[0;97m'  # White
 
 # Additional colors
-LGrey='\033[0;37m'  # Ligth Gray
+LGrey='\033[0;37m'  # Light Gray
 DGrey='\033[0;90m'  # Dark Gray
-LRed='\033[0;91m'   # Ligth Red
+LRed='\033[0;91m'   # Light Red
-LGreen='\033[0;92m' # Ligth Green
+LGreen='\033[0;92m' # Light Green
-LYellow='\033[0;93m'# Ligth Yellow
+LYellow='\033[0;93m'# Light Yellow
-LBlue='\033[0;94m'  # Ligth Blue
+LBlue='\033[0;94m'  # Light Blue
 LPurple='\033[0;95m'# Light Purple
-LCyan='\033[0;96m'  # Ligth Cyan
+LCyan='\033[0;96m'  # Light Cyan
 
 
 # Bold

languages/golang.md

@@ -397,8 +397,8 @@ d, t := doubleAndTriple(5)
 _, t := doubleAndTriple(3)
 // t = 9
 
-// Functions can defer commands. Defered commands are
+// Functions can defer commands. Deferred commands are
-// runned in a stack order after the execution and
+// ran in a stack order after the execution and
 // returning of a function
 var aux = 0
 
@@ -488,7 +488,7 @@ person3.Age // 0
 
 ## Maps
 
-Maps are data structures that holds values assigneds to a key.
+Maps are data structures that holds values assigned to a key.
 
 ```go
 // Declaring a map
@@ -508,7 +508,7 @@ newYork // "EUA"
 // Delete
 delete(cities, "NY")
 
-// Check if a key is setted
+// Check if a key is set
 value, ok := cities["NY"]
 ok // false
 value // ""

languages/java.md

@@ -286,7 +286,7 @@ for(dataType item : array) {
 
 ### ACCESS MODIFIERS
 
-1. defualt(No keyword required)
+1. default(No keyword required)
 2. private
 3. public
 4. protected
@@ -308,7 +308,7 @@ for(dataType item : array) {
   //Declare a variable, object name
   String s;
 
-  //Invoke a contructor to create an object
+  //Invoke a constructor to create an object
   s = new String ("Hello World");
 
   //Invoke an instance method that operates on the object's value

languages/javascript.js

@@ -72,6 +72,7 @@ array.splice(start, deleteCount, item1, item2, ...)  // Adds and/or removes elem
 arr.unshift([element1[, ...[, elementN]]])           // Adds one or more elements to the front of an array and returns the new length of the array.
 
 // Instance: accessor methods
+arr.at(index)                                        // Returns the element at the specified index in the array.
 arr.concat(value1[, value2[, ...[, valueN]]])        // Returns a new array comprised of this array joined with other array(s) and/or value(s).
 arr.includes(searchElement, fromIndex)               // Determines whether an array contains a certain element, returning true or false as appropriate.
 arr.indexOf(searchElement[, fromIndex])              // Returns the first (least) index of an element within the array equal to the specified value, or -1 if none is found.
@@ -94,3 +95,9 @@ arr.reduce(callback[, initialValue])                 // Apply a function against
 arr.reduceRight(callback[, initialValue])            // Apply a function against an accumulator and each value of the array (from right-to-left) as to reduce it to a single value.
 arr.some(callback[, initialValue])                   // Returns true if at least one element in this array satisfies the provided testing function.
 arr.values()                                         // Returns a new Array Iterator object that contains the values for each index in the array.
+
+// String methods
+String.charAt(index)                                 // Returns the character at the specified index in a string.
+String.indexOf(character)                            // Returns the index of the first occurrence of a specified value in a string.
+String.substring(starting_index, ending_index)       // Returns a new string that is a subset of the original string.
+String.substring(starting_index)                     // Returns a substring from starting index to last index of string.

languages/php.php

@@ -1,8 +1,8 @@
 <?php
 
 // Exit the file, string inside get's echo'ed
-die("This file is not ment to be ran. ¯\_(ツ)_/¯");
+die("This file is not meant to be ran. ¯\_(ツ)_/¯");
-exit("This file is not ment to be ran. ¯\_(ツ)_/¯");
+exit("This file is not meant to be ran. ¯\_(ツ)_/¯");
 
 /**
  * Printing
@@ -17,7 +17,7 @@ var_dump($arr); // Print anything, with type hints for any value and sizes
 $string = 'Awesome cheatsheets';
 
 str_contains($string, 'cheat'); // Find if the string contains the specified string (PHP >= 8.0)
-str_replace('Awesome', 'Bonjour', $string); // Replace all occurence
+str_replace('Awesome', 'Bonjour', $string); // Replace all occurrence
 strcmp($string, 'Awesome cheatsheets'); // Compare two strings
 strpos($string, 'a', 0); // Get position in the string
 str_split($string, 2); // Split the string
@@ -541,7 +541,7 @@ u   Pattern is treated as UTF-8
 \w  Any "word" character (a-z 0-9 _)
 \W  Any non "word" character
 \s  Whitespace (space, tab CRLF)
-\S  Any non whitepsace character
+\S  Any non whitespace character
 \d  Digits (0-9)
 \D  Any non digit character
 .   (Period) - Any character except newline

languages/python.md

@@ -71,7 +71,7 @@
 | import | import libraries/modules/packages | import |
 | from | import specific function/classes from modules/packages | import |
 | try | this block will be tried to get executed | exception handling |
-| except | is any exception/error has occured it'll be executed | exception handling |
+| except | is any exception/error has occurred it'll be executed | exception handling |
 | finally | It'll be executed no matter exception occurs or not | exception handling |
 | raise | throws any specific error/exception | exception handling |
 | assert | throws an AssertionError if condition is false | exception handling |

tools/docker.sh

@@ -2,7 +2,7 @@
 # DOCKER
 ##############################################################################
 
-
+docker init                                 # Creates Docker-related starter files 
 docker build -t friendlyname .              # Create image using this directory's Dockerfile
 docker run -p 4000:80 friendlyname          # Run "friendlyname" mapping port 4000 to 80
 docker run -d -p 4000:80 friendlyname       # Same thing, but in detached mode

tools/ubuntu.sh

@@ -21,6 +21,7 @@ cat /proc/<process_id>/maps   # Show the current virtual memory usage of a Linux
 ip r # Display ip of the server
 
 lsof -i :9000 # List process running on port 9000
+kill -9 $(lsof -t -i:PORT) # Kill the process running on whichever port specified
 
 journalctl -u minio.service -n 100 --no-pager # List last 100 logs for specific service
 

tools/vim.txt

@@ -20,13 +20,15 @@ e                   jump to end of words (punctuation considered words)
 E                   jump to end of words (no punctuation)
 b                   jump backward by words (punctuation considered words)
 B                   jump backward by words (no punctuation)
-ge                  jump backward to end of words
+ge                  jump backward to end of a word
+gE                  jump backwards to the end of a word (words can contain punctuation)
 0                   (zero) start of line
 ^                   first non-blank character of line
-$                   end of line
+$                   jump to the end of the line
--                   move line upwards, on the first non blank character
+g_                  jump to the last non-blank character of the line
-+                   move line downwards, on the first non blank character
+-                   move line upwards, on the first non-blank character
-<enter>             move line downwards, on the first non blank character
++                   move line downwards, on the first non-blank character
+<enter>             move line downwards, on the first non-blank character
 gg                  go to first line
 G                   go to last line
 ngg                 go to line n
@@ -38,10 +40,6 @@ nG                  go To line n
 }                   move the cursor a paragraph forwards
 ]]                  move the cursor a section forwards or to the next {
 [[                  move the cursor a section backwards or the previous {
-CTRL-f              move the cursor forward by a screen of text
-CTRL-b              move the cursor backward by a screen of text
-CTRL-u              move the cursor up by half a screen
-CTRL-d              move the cursor down by half a screen
 H                   move the cursor to the top of the screen.
 M                   move the cursor to the middle of the screen.
 L                   move the cursor to the bottom of the screen.
@@ -49,6 +47,16 @@ fx                  search line forward for 'x'
 Fx                  search line backward for 'x'
 tx                  search line forward before 'x'
 Tx                  search line backward before 'x'
+CTRL-y              moves screen up one line
+CTRL-e              moves screen down one line
+CTRL-u              moves cursor & screen up ½ page
+CTRL-d              moves cursor & screen down ½ page
+CTRL-b              moves screen up one page, cursor to last line
+CTRL-f              moves screen down one page, cursor to first line
+zz                  shift current line to middle of screen
+z.                  same as zz but also jumps to the first non-black character
+zt                  shift current line to top of screen
+zb                  shift current line to bottom of screen
 
 
 ##############################################################################
@@ -60,8 +68,15 @@ Tx                  search line backward before 'x'
 ma                  make a bookmark named a at the current cursor position
 `a                  go to position of bookmark a
 'a                  go to the line with bookmark a
+`0                  go to the position where Vim was previously exited
+`"                  go to the position when last editing this file
 `.                  go to the line that you last edited
+``                  go to the position before the last jump
+g,                  go to newer position in change list
+g;                  go to older position in change list
 
+# Tip: To jump to a mark you can either use a backtick (`) or an apostrophe (').
+# Using an apostrophe jumps to the beginning (first non-blank) of the line holding the mark.
 
 ##############################################################################
 # INSERT MODE
@@ -70,10 +85,13 @@ ma                  make a bookmark named a at the current cursor position
 
 i                   start insert mode at cursor
 I                   insert at the beginning of the line
+gi                  return to insert mode where you inserted text the last time
+gI                  like "I", but always start in column 1
 a                   append after the cursor
 A                   append at the end of the line
 o                   open (append) blank line below current line
 O                   open blank line above current line
+CTRL-o              Temporarily enter normal mode to issue one normal-mode command(while in insert mode)
 Esc                 exit insert mode
 
 
@@ -84,10 +102,25 @@ Esc                 exit insert mode
 
 r                   replace a single character (does not use insert mode)
 R                   enter Insert mode, replacing characters rather than inserting
-J                   join line below to the current one
+J                   join line below to the current one with one space in between
+gJ                  join line below to the current one without space in between
 cc                  change (replace) an entire line
-cw                  change (replace) to the end of word
+cw                  change (replace) to the end of word (same as ce)
-C                   change (replace) to the end of line
+2cw                 change (replace) repeat cw twice
+ciw                 change (replace) word under the cursor
+caw                 change (replace) word under the cursor and the space after or before it
+ci"                 change (replace) word inside ""
+cit                 change (replace) html tag content
+cat                 change (replace) html tag
+cis                 change (replace) sentence under the cursor
+cas                 change (replace) sentence under the cursor and the space after or before it
+cib                 change (replace) inside a block with ()
+cab                 change (replace) a block with ()
+ciB                 change (replace) inside a block with {}
+caB                 change (replace) a block with {}
+C                   change (replace) to the end of line(same as c$)
+cG                  change (replace) to the end of the file
+cgg                 change (replace) from first line to current line
 ct'                 change (replace) until the ' character (can change ' for any character)
 s                   delete character at cursor and substitute text
 S                   delete line at cursor and substitute text (same as cc)
@@ -102,14 +135,16 @@ guiw                make current word lowercase
 gU$                 make uppercase until end of line
 gu$                 make lowercase until end of line
 >>                  indent line one column to right
+>i{                 indent everything in the {}
 <<                  indent line one column to left
 ==                  auto-indent current line
 ddp                 swap current line with next
-ddkp                swap current line with previous
+ddkP                swap current line with previous
 :%retab             fix spaces / tabs issues in whole file
 :r [name]           insert the file [name] below the cursor.
 :r !{cmd}           execute {cmd} and insert its standard output below the cursor.
 
+# Tip: Instead of b or B one can also use ( or { respectively.
 
 ##############################################################################
 # DELETING TEXT
@@ -118,10 +153,15 @@ ddkp                swap current line with previous
 
 x                   delete current character
 X                   delete previous character
-dw                  delete the current word
+dw                  delete (cut) to the end of word (same as de)
+diw                 delete (cut) word under the cursor
+daw                 delete (cut) word under the cursor and the space after or before it
+dap                 delete (cut) a paragraph
 dd                  delete (cut) a line
-dt'                 delete until the next ' character on the line (replace ' by any character)
+dt'                 delete (cut) until the next ' character on the line (replace ' by any character)
-D                   delete from cursor to end of line
+dG                  delete (cut) to the end of the file
+dgg                 delete (cut) from first line to current line
+D                   delete (cut) from cursor to end of line (same as d$)
 :[range]d           delete [range] lines
 
 
@@ -136,6 +176,10 @@ yy                  yank (copy) a line
 y$                  yank to end of line
 p                   put (paste) the clipboard after cursor/current line
 P                   put (paste) before cursor/current line
+gp                  put (paste) the clipboard after cursor and leave cursor after the new text
+gP                  put (paste) before cursor and leave cursor after the new text
+"+y                 yank into the system clipboard register
+"+p                 paste from the system clipboard register
 :set paste          avoid unexpected effects in pasting
 :registers          display the contents of all registers
 "xyw                yank word into register x
@@ -147,6 +191,12 @@ P                   put (paste) before cursor/current line
 "xgP                just like "P", but leave the cursor just after the new text
 :[line]put x        put the text from register x after [line]
 
+# Tip: if you are using vim extension on vs code, you can enable
+"vim.useSystemClipboard": true
+in setting.json, this will allow to Use system clipboard for unnamed register.
+
+
+
 
 ##############################################################################
 # MACROS
@@ -157,6 +207,7 @@ qa                  start recording macro 'a'
 q                   end recording macro
 @a                  replay macro 'a'
 @:                  replay last command
+@@                  repeat macro
 
 
 ##############################################################################
@@ -172,9 +223,11 @@ CTRL-v              start visual block mode
 O                   move to other corner of block
 aw                  mark a word
 ab                  a () block (with braces)
-ab                  a {} block (with brackets)
+aB                  a {} block (with brackets)
+at                  a block with <> tags
 ib                  inner () block
-ib                  inner {} block
+iB                  inner {} block
+it                  inner <> block
 Esc                 exit visual mode
 
 VISUAL MODE COMMANDS
@@ -194,6 +247,7 @@ v%                  selects matching parenthesis
 vi{                 selects matching curly brace
 vi"                 selects text between double quotes
 vi'                 selects text between single quotes
+gv                  reselect the last selected area
 
 ##############################################################################
 # SPELLING
@@ -283,7 +337,6 @@ CTRL-w <            increase window width
 CTRL-w >            decrease window width
 CTRL-w =            equal window
 CTRL-w o            close other windows
-zz                  Centers the window to the current line
 
 
 ##############################################################################
@@ -306,12 +359,14 @@ clast               display the last error
 
 
 %                   show matching brace, bracket, or parenthese
-gf                  edit the file whose name is under or after the cursor
+gf                  edit the file whose name is under the cursor
+gF                  edit the file whose name is under the cursor and jump to the line number
 gd                  when the cursor is on a local variable or function, jump to its declaration
 ''                  return to the line where the cursor was before the latest jump
-gi                  return to insert mode where you inserted text the last time
 CTRL-o              move to previous position you were at
 CTRL-i              move to more recent position you were at
+:set nu             display numbers (short for :set number)
+:set nonu           hide numbers (short for :set nonumber)
 
 
 ##############################################################################

tools/vscode.md

@@ -6,7 +6,8 @@
 
 #### General
 
-- `Ctrl`+`Shift`+`P`, `F1`:  Show Command Palette
+- `Ctrl`+`Shift`+`P`, `F1`: Show Command Palette
+- `Ctrl`+`Shift`+`T`: Open last closed tab
 - `Ctrl`+`P`: Quick Open, Go to File
 - `Ctrl`+`Shift`+`N`: New window/instance
 - `Ctrl`+`W`: Close window/instance