Cheat Sheet

Unix

Log command output

( [command] 2>&1 | tee the.log && exit $PIPESTATUS )

Perl

Start

The top should always look like this:

#!/usr/bin/perl
use warnings;
use string;
use diagnostics; #Only use if the warning you get is not good enough (or *)

* - At the command line type:

$ perl -Mdiagnostics ./my_program

Data Types

• $ - Scalar
• @ - Array
• % - Hashes

• $myValue - A single scalar value
  A number, word, reference
• $myValues[10] - A single scalar value inside the 11th element
  of the array @myValues
• $myValues{'aKey'} - A single scalar value inside the hash %myValues
  Stored in element with key 'aKey'
• $#myValues - The last index of array @myValues