Regular Expression & Parsed Elation

Jul 4, 2008

Here’s a little app I wrote during a project to test ActionScript 3’s regular expressions.

Character Classes —————–

• \w - word character [A-Za-z0-9_]
• \W - non-word character [^\w]
• \s - space character [ \t\r\n]
• \S - non-space character [^\s]
• \d - digit [0-9]
• \D - non-digit character [^\d]

Quantifiers

• ? - zero or one
• \* - zero or more
• • • one or more
• \{min, max\} - ranged selection

Avoiding Back-tracking

Negative boundary matching

/”[^”]*”/ - match all characters between double quotes

Atomic Groups

/”(?>[^”]*)”/ - drops positions after a match is made

tags: [ regex ]