Merge 0de5e8fef1 into 10872e02d1

add docker init command to docker cheatsheet

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

@@ -47,7 +47,8 @@ CTRL+X then )   # finish recording keyboard macro
 CTRL+X then E   # recall last recorded keyboard macro
 CTRL+X then CTRL+E   # invoke text editor (specified by $EDITOR) on current command line then execute resultes as shell commands
 CTRL+A then D  # logout from screen but don't kill it, if any command exist, it will continue 
-
+CTRL+T then Z # Minimizes the current session or sends the current session to the background.
+fg(foreground) # Maxmizes the current session 
 BACKSPACE      # deletes one character backward
 DELETE         # deletes one character under cursor
 

languages/python.md

@@ -380,3 +380,14 @@ function_name()
 * We need not to specify the return type of the function.
 * Functions by default return `None` 
 * We can return any datatype.
+### f strings
+* Short of "formatted string".
+* Allow us to to embed expressions inside string literals.
+* f-strings are denoted by "f" or "F" prefix before the string
+* Expressions are closed by curly braces '{}' with the f-string
+```
+name = "Alice"
+print(f"Hello, I am {name} and I am a programmer.")
+
+```
+	

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