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zez.org: Regular expressions explained

Nov 07, 2000, 00:37 (5 Talkback[s])
(Other stories by Jan Borsodi)

[ Thanks to Paul K Egell-Johnsen for this link. ]

"This article will give you an introduction to the world of regular expressions. I'll start off with explaining what regular expressions are and introduce it's syntax, then some examples with varying complexity and last a list of tools which use regular expressions."

"A regular expression is a text pattern consisting of a combination of alphanumeric characters and special characters known as metacharacters. A close relative is in fact the wildcard expression which are often used in file management. The pattern is used to match against text strings. The result of a match is either successful or not, however when a match is successful not all of the pattern must match, this is explained later in the article."

"You'll find that regular expressions are used in three different ways: Regular text match, search and replace and splitting. The latter is basicly the same as the reverse match ie. everything the regular expression did not match."

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