Comments on: REGULAR EXPRESSIONS / META CHARACTERS REGEXP_INSTR http://itknowledgeexchange.techtarget.com/itanswers/regular-expressions-meta-characters-regexp_instr/ Sat, 26 May 2012 08:10:51 +0000 http://wordpress.org/?v=2.6.2 By: TomLiotta http://itknowledgeexchange.techtarget.com/itanswers/regular-expressions-meta-characters-regexp_instr/#comment-104499 TomLiotta Tue, 06 Mar 2012 07:57:15 +0000 #comment-104499 Generally, a caret (^) represents "Beginning of Line Anchor". However, when used inside brackets with selection characters, a caret takes on a second meaning -- it means "not these characters". The expression can't confuse the meaning because it cannot mean "Beginning of Line Anchor" when it's inside the brackets. Words and other symbols can have different meanings when used in different ways. The surrounding symbols can modify the meanings. Tom Generally, a caret (^) represents “Beginning of Line Anchor”. However, when used inside brackets with selection characters, a caret takes on a second meaning — it means “not these characters”. The expression can’t confuse the meaning because it cannot mean “Beginning of Line Anchor” when it’s inside the brackets.

Words and other symbols can have different meanings when used in different ways. The surrounding symbols can modify the meanings.

Tom

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