February 24th Notes

Loops (Can Refer To February 10th Notes)

number-based for loop (Regular loop) --> Yay

list-based for loop (For each) --> Ugh

Number-based For Loop (Refer To myKoolestGameV3.bash)
----------------------------------------------------

for((i=0;i<#;i++));
do
// stuff
done <-- Ends the loop

value=$(( <-- Double para's mean a pocket of arithmitic
  ^   ^ <-- Dollar sign means that it's going to the value
  | <-- Name

$ - You can access what's inside the variable (Not like Java)

Quotes
------

1.) " <-- Half-quotes: allow expansions. (Allows groupings of characters)
2.) ' <-- Full-quotes: literal quote - No expansion (Characters)
3.) ` <-- Back-quote/tick: enabling command expansion
4.) $( ) <-- Does the same thing as 3 (Unix prefers this method)

Example: echo "$(ls)" <-- You want the quotes to display what's happening.

Expansions
----------
1.) variable expansion
2.) algebraic expansion value=$((math))
3.) command expansion

Neat Tricks
-----------

${0} <-- Naming wise, it names it the actual name of the program running it.



List Base For-each Loop
-----------------------

for item in $*; <-- Probably refering to the current directory your in.
do



done

OR

for entry in a b c d; <-- Runs a b c d, number of times
do



done

OR

for entry in 'ls';
do

// This one is really cool

done


Wild Cards
----------

* - 0 or more of anything
? - 1 of any single character
[ ] - Character class (Grouping of characters. Example: ls [t] --> List everything with a t (Lowercase or Uppercase)
[^ ] - Inverted char class (When grouped with characters, means those characters cannot be that.
     ^ <-- [^aeiou]?? First character cannot be those characters.

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