大约有 46,000 项符合查询结果(耗时:0.0593秒) [XML]

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Select by partial string from a pandas DataFrame

... Based on github issue #620, it looks like you'll soon be able to do the following: df[df['A'].str.contains("hello")] Update: vectorized string methods (i.e., Series.str) are available in pandas 0.8.1 and up. ...
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Make Div overlay ENTIRE page (not just viewport)?

...nd why this is so hard to do... I've tried setting body, html heights to 100% etc but that isn't working. Here is what I have so far: ...
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What is a “context bound” in Scala?

... 107 Did you find this article? It covers the new context bound feature, within the context of arra...
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How does a garbage collector avoid an infinite loop here?

... 110 As per Richter in the second edition of CLR via C# (yes I need to update): Page 478 For (Th...
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String comparison using '==' vs. 'strcmp()'

... The reason to use it is because strcmp returns < 0 if str1 is less than str2; > 0 if str1 is greater than str2, and 0 if they are equal. === only returns true or false, it doesn't tell you which is the "greater" string. ...
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How to specify a min but no max decimal using the range data annotation attribute?

I would like to specify that a decimal field for a price must be >= 0 but I don't really want to impose a max value. 10 Ans...
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Pad a number with leading zeros in JavaScript [duplicate]

...a lot of "slick" going on so far: function pad(n, width, z) { z = z || '0'; n = n + ''; return n.length >= width ? n : new Array(width - n.length + 1).join(z) + n; } When you initialize an array with a number, it creates an array with the length set to that value so that the array appear...
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Inserting string at position x of another string

... "I want apple"; var b = " an"; var position = 6; var output = [a.slice(0, position), b, a.slice(position)].join(''); console.log(output); Optional: As a prototype method of String The following can be used to splice text within another string at a desired index, with an optional remov...
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How can I ensure that a division of integers is always rounded up?

... 670 UPDATE: This question was the subject of my blog in January 2013. Thanks for the great question!...
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Android: How to change CheckBox size?

... answered Jan 28 '10 at 7:36 moraesmoraes 11.8k77 gold badges4141 silver badges5858 bronze badges ...