The only thing I regret is that matching non greediness has not been made the default.
Non-greediness is only useful if you have something following the non-greediness. For example, /(\d*)/ would not be useful at all: it would always succeed, matching and capturing an empty string. /(\d+)/ would be equivalent to /(\d)/, because a non-greedy expression doesn't take more than the absolute minimum.
If you use non-greedy quantifiers now, think about the efficiency that is gained by re-writing for greediness. Suppose you have /"(.*?)"/ - it can be written as /"([^"]*)"/, which is much more efficient. With backtracking disabled, as jryan did in his example (with the new : meta character), it's even more efficient (in case the subject string is not well formed).
- Yes, I reinvent wheels.
- Spam: Visit eurotraQ.
Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
Read Where should I post X? if you're not absolutely sure you're posting in the right place.
Please read these before you post! —
Posts may use any of the Perl Monks Approved HTML tags:
Outside of code tags, you may need to use entities for some characters:
- a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
Link using PerlMonks shortcuts! What shortcuts can I use for linking?
See Writeup Formatting Tips and other pages linked from there for more info.
| & || & |
| < || < |
| > || > |
| [ || [ |
| ] || ] ||