Re^2: matching and mysterious captures

I see, I was matching the minimum which was 0 \s's and 0 spaces.

Your example works, except in the case of:


echo -e 'zero\none\ntwo    three' | perl -0777 -pe 's{\s*(one\ntwo)\s*
+^( *)}{\n\n<begin block>\n\n$1\n\n<end block>\n\n$2}m'
zero
one
two    three
[download]

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Re^3: matching and mysterious captures by kennethk (Abbot) on May 05, 2011 at 18:00 UTC
What do you expect to get for the case you've listed? This falls outside any of the cases you've described above - see I know what I mean. Why don't you?. If you expect to get `zero <begin block> one two <end block> three` [download] which cleans out blank lines but keeps the spaces before three, you can use a non-capturing group `(?:...)` combined with the `?` quantifier to make the whitespace matching conditional: `echo -e 'zero\none\ntwo three' \| perl -0777 -wpe 's{\s(one\ntwo)(?:\s^)?( *)}{\n\n<begin block>\n\n$1\n\n<end block>\n\n$2}m'`	[reply] [d/l] [select]
Re^4: matching and mysterious captures by Allasso (Monk) on May 05, 2011 at 18:51 UTC
ah yes, that's what I was looking for. I knew something like that would work, but I couldn't quite get the right combination. Sorry for the confusion, no, I didn't state my needs very clearly.	[reply]