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-- name: Regular Expressions


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DemoStack 0.9

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Regular Expressions

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Card #8

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Research is used for searching for a pattern in either a single input string, or in a list of containers, which may be in more than one card.

REGULAR EXPRESSIONS

Following is a brief summary of the regular expressions understood by Research.

c         match character c
\c       take away special meaning of c
[...]    characters in [...]; ranges like a-z
[^...]  characters not in [...]; ranges like a-z
^r      anchor to start of line
r$     anchor to end of line
r*     zero more times
r+     one or more times
r?     zero or one time
r{n}  repeat n times
r{n,} repeat n times or more
r{,m} repeat 0 to m times
r{n,m} repeat n to m times
\(r\) tag expression
\n      refer to n'th tagged expression
r1|r2 expression r1 or r2
(r)   group expression



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Description