Merge pull request #328 from biswajitdas-007/javascript

String methods added

languages/java.md

@@ -77,7 +77,6 @@ a \|= b; //a is the variable name; b is the variable name; this expression is an
   System.out.print(String s) //print s
   System.out.println(String s) //print s, followed by a newline
   System.out.println() //print a newline
-  System.out.printf() //use %d for print integer, %c for char, use %f for float, use %s for string
 ```
 
 ### PARSING COMMAND-LINE ARGUMENTS
@@ -387,12 +386,6 @@ class MyClass extends MySuperClass implements YourInterface {
 * A class contains constructors that are invoked to create objects from the class blueprint.
 * Constructor declarations look like method declarations—except that they use the name of the class and have no return type
 * Each and every class has defualt No-args constructor.
-* constructor can also be override by giving the argumentsto it.
-**Example:**
-class constructor{
-	public constructor(){//the constructor name is same as of class name and it does not have any return type
-	System.out.println("I am a constructor");
-}
 
 
 ```java
@@ -655,11 +648,3 @@ public class Queue<Item> implements Iterable<Item> {
   boolean contains(Key key) //return if the key is in the set
   int size() //number of elements in set
 ```
-## ADVANCE JAVA
-There are some advance topic in java which done the work very easy and relieable.
-**Collection   Framework**
-It include-:
-1.Arraylist
-2.Set
-3.Stack
-4.Harshmap

languages/javascript.js

@@ -95,3 +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.

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