大约有 46,000 项符合查询结果(耗时:0.0594秒) [XML]

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float64 with pandas to_csv

I'm reading a CSV with float numbers like this: 2 Answers 2 ...
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How can I filter a Django query with a list of values?

I'm sure this is a trivial operation, but I can't figure out how it's done. 3 Answers ...
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Declare and Initialize String Array in VBA

This should work according to another stack overflow post but its not: 6 Answers 6 ...
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Case insensitive string compare in LINQ-to-SQL

I've read that it's unwise to use ToUpper and ToLower to perform case-insensitive string comparisons, but I see no alternative when it comes to LINQ-to-SQL. The ignoreCase and CompareOptions arguments of String.Compare are ignored by LINQ-to-SQL (if you're using a case-sensitive database, you get a ...
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Pythonic way to check if a list is sorted or not

...follow | edited Jan 29 '18 at 14:08 Andreas Haferburg 4,42311 gold badge2424 silver badges4949 bronze badges ...
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How to validate an Email in PHP?

...he filter_var() function, which gives you a lot of handy validation and sanitization options. filter_var($email, FILTER_VALIDATE_EMAIL) PHP Manual filter_var() Available in PHP >= 5.2.0 If you don't want to change your code that relied on your function, just do: function isValidEmail($emai...
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Display block without 100% width

...her element using the display property. I tried applying inline-block but without success, and figured I could use block if I somehow managed to avoid giving the element a width of 100% (I don't want the element to "stretch out"). Can this be done, or if not, what's good praxis for solving this kind...
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Can I use git diff on untracked files?

Is it possible to ask git diff to include untracked files in its diff output, or is my best bet to use git add on the newly created files and the existing files I have edited, then use: ...
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Group by multiple columns in dplyr, using string vector input

... (documentation here). This lets you use the same functions you would use with select, like so: data = data.frame( asihckhdoydkhxiydfgfTgdsx = sample(LETTERS[1:3], 100, replace=TRUE), a30mvxigxkghc5cdsvxvyv0ja = sample(LETTERS[1:3], 100, replace=TRUE), value = rnorm(100) ) # get the co...
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How to get all subsets of a set? (powerset)

... The Python itertools page has exactly a powerset recipe for this: from itertools import chain, combinations def powerset(iterable): "powerset([1,2,3]) --> () (1,) (2,) (3,) (1,2) (1,3) (2,3) (1,2,3)" s = list(iterable) ...