Re^2: Splitting on escapable delimiter

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Re^3: Splitting on escapable delimiter
by ikegami (Patriarch) on Mar 28, 2008 at 21:10 UTC

Nope, that returns an extra (empty) field most of the time, and there's no way to know when. For example, 'a@b' incorrectly returns 3 fields, although 'a@' correctly returns 2.

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Re^4: Splitting on escapable delimiter

by Roy Johnson (Monsignor) on Mar 31, 2008 at 19:55 UTC

Update: this seems to work:

  my @pieces = /(?:^|\G@)((?:#.|[^@])*)/sg;
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Caution: Contents may have been coded under pressure.

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Re^5: Splitting on escapable delimiter

by ikegami (Patriarch) on Mar 31, 2008 at 21:49 UTC

Still don't know why I couldn't get it to realize it had hit end of string

It's seen as somewhat of a bug. It happens when the search expression can match a zero length string. In the followig, the parens indicate what the three passes of your earlier s/// matches:

(a@)(b)()
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Or in terms of @- and @+:

pass @- @+

1 0 2

2 2 3

3 3 3

The /g loop ends when the fourth pass matches the same thing as the third pass and pos+1 is beyond the end of the string.

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