Breaking the Ice With Regular Expressions with Dan Bickford [repost]

Search for text patterns using regular expressions and learn to validate emails and URLs, capture information, and use simple patterns to save development time.

LEVEL 1
The String Story
Learn what regular expressions are, and write your first expression. Discover literals, operators, character sets, modifiers, and metacharacters.

LEVEL 2
Crew Emails
Journey into validating emails with wildcards, escaping characters, groups, and anchors.

LEVEL 3
Confirmative
Take a voyage to the edge with word boundaries and creating optional variations. Negate characters within character sets, and then use the negated shorthand. Finally, match specific amounts of characters with interval expressions.

LEVEL 4
Multi-line Strings
Discover multi-line strings, and journey deeper with much larger subject strings. Search the globe and properly drop anchors with global and multi-line modifiers.

LEVEL 5
Capture Groups
Grab the loot with capture groups, and learn how to extract sections of text for reference. Also discover when it's appropriate to have groups not capture.