大约有 30,000 项符合查询结果(耗时:0.0380秒) [XML]

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How to pause for specific amount of time? (Excel/VBA)

... wasn't working in Excel 2010. This works though : Application.Wait (Now + TimeValue("0:00:01")) – ZX9 Mar 4 '15 at 18:56 1 ...
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Learning Regular Expressions [closed]

...e subpattern it modifies optional. Other quantifiers are * (zero or more times) + (one or more times) {n} (exactly n times) {n,} (at least n times) {n,m} (at least n times but no more than m times) Putting some of these blocks together, the pattern [Nn]*ick matches all of ick Nick nick Nnick n...
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Why is Lisp used for AI? [closed]

...tc) and implementations of successful research is usually in C or C++ (sometimes Java). If you're curious about the 70's...well, I wasn't there. But I think Lisp was successful in AI research for three reasons (in order of importance): Lisp is an excellent prototyping tool. It was the best for a ...
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How to get all subsets of a set? (powerset)

...nd, comparing some other solutions on this page to this one using Python's timeit module. However, in certain cases, if you need to modify the resulting output (e.g. joining the letters to form strings) writing a custom recipe utilizing generators and building up the output you want (e.g. adding tog...
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How can I benchmark JavaScript code? [closed]

... Just time several iterations of each function. One iteration probably won't be enough, but (depending on how complex your functions are) somewhere closer to 100 or even 1,000 iterations should do the job. Firebug also has a profi...
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How does StartCoroutine / yield return pattern really work in Unity?

....g. keep processing A* nodes for X milliseconds. (Some people call thistimeslicing’, though I don’t). Still, allowing the work to be broken up in this way means you have to transfer state from one frame to the next. If you’re breaking an iterative algorithm up, then you’ve got to pr...
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Is there a Unix utility to prepend timestamps to stdin?

...nto which would prepend each line with some text -- in my specific case, a timestamp. Ideally, the use would be something like: ...
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Stripping everything but alphanumeric chars from a string in Python

... I just timed some functions out of curiosity. In these tests I'm removing non-alphanumeric characters from the string string.printable (part of the built-in string module). The use of compiled '[\W_]+' and pattern.sub('', str) was ...
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Fastest way to convert string to integer in PHP

... I've just set up a quick benchmarking exercise: Function time to run 1 million iterations -------------------------------------------- (int) "123": 0.55029 intval("123"): 1.0115 (183%) (int) "0": 0.42461 intval("0"): 0.9...
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Should IBOutlets be strong or weak under ARC?

...t that's not always going to be retained by the view hierarchy. The only time you really need to make an outlet weak is if you have a custom view that references something back up the view hierarchy and in general that's not recommended. I asked about this on Twitter to an engineer on the IB...