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Thursday, January 26, 2012

Reg Expression: Match between characters (non greedy)

Needed to match characters on one line from start string >; to end string <

>;(.*?)<

Note:

.* –This will match all characters (except end of line), this is called greedy as it will keep on matching until eol. then backtrack as it still wants to match the <. It will therefore match from first to last.

.*? – This will make it not greedy and will match from >; to first instance of <

i.e.

Example

string to be searched:- >;banana<blinky>;apple<cider>;orange<beer>

Greedy
reg expressions:-
>;(.*)<
result:- >;banana<blinky>;apple<cider>;orange<

Non Greedy
reg expressions:-
>;(.*?)<
result:- >;banana<


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