Constructs
- You can do C-style for loops,but you often don't need them
- Don't use them where a foreach will do
- Don't use them where a while will do
- Create an anonymous array reference, and assign it:
- This is "anonymous" because we didn't have to create an array
- Hashes have a similar constructor
- Treat as you'd otherwise treat a reference
-
- Single quotes: 'text' => q/text/
- Double quotes: "text" => qq/text/
- Backticks: => qx/text/
- Regex match (
m//
), Regex substitute (s///
), and translate (,y///
) work the same way
- You can use any character except whitespace.
- But use something balanced like parens or braces
- Declare global variables with
use vars
. - Declare lexical variables with
local
is not what you think, usemy
instead unless you know why you're using local- Use only when your package needs a global variable