大约有 47,000 项符合查询结果(耗时:0.0377秒) [XML]

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How to run a background task in a servlet based web application?

... 218 Your problem is that you misunderstand the purpose of the servlet. It's intented to act on HTTP...
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What is the performance of Objects/Arrays in JavaScript? (specifically for Google V8)

... 281 +100 I create...
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Printf width specifier to maintain precision of floating-point value

... in: #include <float.h> int Digs = DECIMAL_DIG; double OneSeventh = 1.0/7.0; printf("%.*e\n", Digs, OneSeventh); // 1.428571428571428492127e-01 But let's dig deeper ... Mathematically, the answer is "0.142857 142857 142857 ...", but we are using finite precision floating point numbers. L...
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is it possible to select EXISTS directly as a bit?

... you'll have to use a workaround. If you must return a conditional bit 0/1 another way is to: SELECT CAST( CASE WHEN EXISTS(SELECT * FROM theTable where theColumn like 'theValue%') THEN 1 ELSE 0 END AS BIT) Or without the cast: SELECT CASE WHEN EXISTS( SELECT 1 FROM theTa...
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How to change the style of alert box?

... 13 Answers 13 Active ...
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Is there a version of JavaScript's String.indexOf() that allows for regular expressions?

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How to remove last n characters from every element in the R vector

... 117 Here is an example of what I would do. I hope it's what you're looking for. char_array = c("...
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Less aggressive compilation with CSS3 calc

The Less compilers that I'm using ( OrangeBits and dotless 1.3.0.5 ) are aggressively translating 4 Answers ...
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Scala: what is the best way to append an element to an Array?

...repend it: 0 +: array :+ 4 should produce: res3: Array[Int] = Array(0, 1, 2, 3, 4) It's the same as with any other implementation of Seq. share | improve this answer | ...
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How do you round a float to two decimal places in jruby

JRuby 1.6.x. How do you round a float to decimal places in jruby. 6 Answers 6 ...