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Brian -dot- Henderson -at- mitchell1 -dot- com [Brian -dot- Henderson -at- mitchell1 -dot- com] wrote:
> The tutorial is good as a general primer on the principals of RegEx, but individual programs
> and applications will vary in the ways regular expressions are created.
>
> For example, in the two main plain text editors I use:
> TextPad: ^ as the first character of an RE anchors the expression to the beginning of the line.
> EditPlus: ^ as the first character of an RE means none of the enclosed characters may match
> the target character.
But that's not a difference between regex parsers; that double usage of "^" is common to all POSIX/Perl regular-expression parsers. If the "^" is the first character inside a pair of brackets, it means "match any character not within the brackets", but if the "^" is unbracketed it means "match start of line" (or start of string).
-Andrew
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