An Intro to Perl, Pt. 2 Hashes, Foreach Control, and the Split Function

Hashes (Associative Arrays) Arrays with string indices Each index is called a key Different braces than arrays ({} not []) Use the % sigil to symbolize a hash

Example Hashes $numbers{“one”}=”1”; Assigns 1 to key “one” $numbers{“two”}=”2”; (accessed as a scalar) $numbers{“three”}=”3”; %numbers=(“one”,”1”,”two”,”2”,”three”,”3”); Creates hash with indices one, two, three and values of 1, 2, and 3

Hash Control while(($key, $value) = each %numbers){ print "$key $value\n”;} Prints out individual Key-value pairs for the hash

Foreach Control Statement For loop designed for processing arrays, hashes, and “is”, “an”, “array”); foreach $word print = ('Larry', 'Curly', 'Moe'); foreach { print $_. “\n”;}

The Split Function Splits a string using a specific " ", $string; If $string = “The quick brown (“The”, “quick”, “brown”, “fox”) Default delimiter is a space “ “ $info = "Caine:Michael:Actor:14, Leafy = split(/:/, $info);