Hi,
> Date: Tue, 23 Oct 2012 12:48:38 -0700
> From:
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> To:
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> Subject: [Help-smalltalk] GST's regex syntax..
>
> Ok.. So I'm chewing text again.. this time with regular expressions..
>
> I'm having problems with repeating patterns that I'm hoping to solve..
>
> If I've got the string "My DOG and CAT ate the BIG blue BIRD" in the
> file "foo.txt" and want to find all uppercase 3 & 4 letter words I was
> hoping to use the following code snippet :
>
> | fileStream coll |
>
> fileStream := FileStream open: 'foo.txt' mode: FileStream read.
> coll := OrderedCollection new.
> fileStream linesDo: [:line |
> (line =~ '([A-Z]{3,4})+') ifMatched: [:match | coll add: match].
> ].
> coll inspect.
>
> However the result is just DOG -- the others are missing.. What is
> wrong
> with the repeating aspect of it where there are multiple hits within a
> single line? It works fine for one hit per line but not multiples..
> Any ideas? Thanks!
From manual:
1.155.9 String: regex
=~ patternAnswer a RegexResults object for matching the receiver against
the Regex or String object pattern.
allOccurrencesOfRegex: patternFind all the matches of pattern within the receiver and
collect them into an OrderedCollection.
allOccurrencesOfRegex: pattern do: aBlockFind all the matches of pattern within the receiver and
pass the RegexResults objects to aBlock.
So =~ looks for first occurrence, try other one, and the match then is an OrderedCollection.
Best regards,
Leszek
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