安裝中文字典英文字典辭典工具!
安裝中文字典英文字典辭典工具!
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- How to match, but not capture, part of a regex? - Stack Overflow
A variation of the expression by @Gumbo that makes use of \K for resetting match positions to prevent the inclusion of number blocks in the match Usable in PCRE regex flavours
- OR condition in Regex - Stack Overflow
For example, ab|de would match either side of the expression However, for something like your case you might want to use the ? quantifier, which will match the previous expression exactly 0 or 1 times (1 times preferred; i e it's a "greedy" match) Another (probably more relyable) alternative would be using a custom character group:
- Regular expression to stop at first match - Stack Overflow
to capture a match between start and the first occurrence of end Notice how the subexpression with nested parentheses spells out a number of alternatives which between them allow e only if it isn't followed by nd and so forth, and also take care to cover the empty string as one alternative which doesn't match whatever is disallowed at that
- How do if statements differ from match case statments in Python?
28 PEP 622 provides an in-depth explanation for how the new match-case statements work, what the rationale is behind them, and provides examples where they're better than if statements In my opinion the biggest improvement over if statements is that they allow for structural pattern matching, as the PEP is named
- Negative matching using grep (match lines that do not contain foo)
How do I match all lines not matching a particular pattern using grep? I tried this: grep '[^foo]'
- regex - Match groups in Python - Stack Overflow
Is there a way in Python to access match groups without explicitly creating a match object (or another way to beautify the example below)? Here is an example to clarify my motivation for the quest
- Differences between re. match, re. search, re. fullmatch
Answer (line anchors vs string anchors) What this tells me is that re match and re fullmatch don't match line anchors ^ and $ respectively, but that they instead match string anchors \A and \Z respectively
- caching - HTTP If-None-Match vs. If-Match - Stack Overflow
If-Match If-Unmodified-Since If-Range The last 2 seems irrevelent to my caching system (they seem to be used when resuming "big" downloads) but I haven't found if "If-Match" could be of use in my system Does "If-Match" is used in proxies or Web browser for "regular" page content? How "If-Match" is different than "If-None-Match"?
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