Re: Easy Split

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Re^2: Easy Split by ropey (Hermit) on Jul 03, 2009 at 15:48 UTC
ok - so does that mean there is no solution just with split?	[reply]
Re^3: Easy Split by liverpole (Monsignor) on Jul 03, 2009 at 16:01 UTC
Hi ropey, If I'm understanding your requirements correctly, you could use a negative-lookbehind assertion like this: `use strict; use warnings; my $string = '111111111:22222\:2222:333333333:4444444'; my @split = split(/(?<!\\):/, $string); print "Results:\n"; map { print "$_\n" } @split;` [download] Which produces this: `Results: 111111111 22222\:2222 333333333 4444444` [download] You'd still need to handle the escaped '\', but the above code at least doesn't split on ':' if it's preceded by '\'. Of course, that doesn't take into account the situation where a backslash '\' is really the second of a pair of backslashes, as in: `my $string = 'AAA:BBB:CCC\\:CCC:DDD";` [download] ... so it's really only a simplistic, partial solution. s''(q.S:$/9=(T1';s;(..)(..);$..=substr+crypt($1,$2),2,3;eg;print$..$/	[reply] [d/l] [select]
Re^3: Easy Split by ikegami (Patriarch) on Jul 03, 2009 at 16:23 UTC
It means that `$csv->getline` is much simpler, much more readable and much more maintainable than any solution involving `split`, so I didn't see the point of coming up with a solution involving `split`.	[reply] [d/l] [select]
Re^3: Easy Split by massa (Hermit) on Jul 06, 2009 at 17:22 UTC
`split /[^\\](?:\\\\)\K:/, $string` worked Ok for me: it splits on an even number of inverted bars, followed by a colon, but keeps the bars in the split strings. `sub x($) { local($_) = @_; say "\n$_ ==>"; say for split /[^\\](?:\\\\)\K:/, $_ } x $_ for <DATA>; __DATA__ 111111111:22222\:2222:333333333:4444444 111111111:22222\\:2222:333333333:4444444 111111111:22222\\\:2222:333333333:4444444 111111111:22222\\\\:2222:333333333:4444444` [download] Result: `111111111:22222\:2222:333333333:4444444 ==> 111111111 22222\:2222 333333333 4444444 111111111:22222\\:2222:333333333:4444444 ==> 111111111 22222\\ 2222 333333333 4444444 111111111:22222\\\:2222:333333333:4444444 ==> 111111111 22222\\\:2222 333333333 4444444 111111111:22222\\\\:2222:333333333:4444444 ==> 111111111 22222\\\\ 2222 333333333 4444444` [download] Beware that `'222\\:222'` only has ONE inverted bar... :-D []s, HTH, Massa (κς,πμ,πλ)	[reply] [d/l] [select]