大约有 43,100 项符合查询结果(耗时:0.0536秒) [XML]

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Understanding the map function

... 451 map isn't particularly pythonic. I would recommend using list comprehensions instead: map(f, it...
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Accessing class variables from a list comprehension in the class definition

...lowing will fail: class A: a = 42 b = list(a + i for i in range(10)) So, to summarize: you cannot access the class scope from functions, list comprehensions or generator expressions enclosed in that scope; they act as if that scope does not exist. In Python 2, list comprehensions were ...
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How to convert list of key-value tuples into dictionary?

...p and zip it. ValueError: dictionary update sequence element #0 has length 1916; 2 is required THAT is your actual question. The answer is that the elements of your list are not what you think they are. If you type myList[0] you will find that the first element of your list is not a two-tuple, e....
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Is there a difference between YES/NO,TRUE/FALSE and true/false in objective-c?

... typedefs in their respective .h files, YES/TRUE/true were all defined as 1 and NO/FALSE/false were all defined as 0 . Is there really any difference? ...
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Pass a parameter to a fixture function

... 105 Update: Since this the accepted answer to this question and still gets upvoted sometimes, I sh...
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Why is rbindlist “better” than rbind?

... 156 rbindlist is an optimized version of do.call(rbind, list(...)), which is known for being slow ...
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How do you find the last day of the month? [duplicate]

... 241 How about using DaysInMonth: DateTime createDate = new DateTime (year, month, ...
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Use ffmpeg to add text subtitles [closed]

... | edited Jun 23 at 19:08 answered Jul 11 '13 at 2:53 ...
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How to create a density plot in matplotlib?

... 124 Sven has shown how to use the class gaussian_kde from Scipy, but you will notice that it doesn...
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How to validate an Email in PHP?

... a small amount of differences, reading the Manual should suffice. Update 1: As pointed out by @binaryLV: PHP 5.3.3 and 5.2.14 had a bug related to FILTER_VALIDATE_EMAIL, which resulted in segfault when validating large values. Simple and safe workaround for this is using strlen() before...