大约有 43,100 项符合查询结果(耗时:0.0469秒) [XML]

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Easiest way to flip a boolean value?

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How do you debug a regex? [closed]

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For loop example in MySQL

... 145 drop table if exists foo; create table foo ( id int unsigned not null auto_increment primary k...
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Converting a column within pandas dataframe from int to string

... 142 In [16]: df = DataFrame(np.arange(10).reshape(5,2),columns=list('AB')) In [17]: df Out[17]: ...
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Check if a number has a decimal place/is a whole number

... Using modulus will work: num % 1 != 0 // 23 % 1 = 0 // 23.5 % 1 = 0.5 Note that this is based on the numerical value of the number, regardless of format. It treats numerical strings containing whole numbers with a fixed decimal point the same as intege...
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Regular Expression For Duplicate Words

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fork() branches more than expected?

... answered Jun 21 '12 at 6:58 wallykwallyk 52.3k1111 gold badges7373 silver badges130130 bronze badges ...
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Why are elementwise additions much faster in separate loops than in a combined loop?

Suppose a1 , b1 , c1 , and d1 point to heap memory and my numerical code has the following core loop. 10 Answers ...
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Prevent jQuery UI dialog from setting focus to first textbox

...n a user clicks a link. There are two textboxes (I only show the code for 1 for brevity) in that dialog div tag and it is changed to be a jQuery UI DatePicker textbox that reacts on focus. ...
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ld cannot find an existing library

... 158 The problem is the linker is looking for libmagic.so but you only have libmagic.so.1 A quick ...