大约有 35,448 项符合查询结果(耗时:0.0400秒) [XML]

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Adding 'serial' to existing column in Postgres

I have a small table (~30 rows) in my Postgres 9.0 database with an integer ID field (the primary key) which currently contains unique sequential integers starting at 1, but which was not created using the 'serial' keyword. ...
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Reading output of a command into an array in Bash

...=$'\n' read -r -d '' -a my_array < <( my_command && printf '\0' ) Please make sure you use exactly this form, i.e., make sure you have the following: IFS=$'\n' on the same line as the read statement: this will only set the environment variable IFS for the read statement only. So it...
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Why does Lua have no “continue” statement?

...Lua 5.2 the best workaround is to use goto: -- prints odd numbers in [|1,10|] for i=1,10 do if i % 2 == 0 then goto continue end print(i) ::continue:: end This is supported in LuaJIT since version 2.0.1 share ...
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Matplotlib transparent line plots

... Plain and simple: plt.plot(x, y, 'r-', alpha=0.7) (I know I add nothing new, but the straightforward answer should be visible). share | improve this answer |...
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How can I round down a number in Javascript?

... | edited Sep 30 '19 at 10:01 Gerrit Bertier 3,1071515 silver badges2727 bronze badges answer...
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C++ auto keyword. Why is it magic?

...r templates on any compiler that even sort of attempted to implement C++98/03. As such, adding support for auto was apparently fairly easy for essentially all the compiler teams--it was added quite quickly, and there seem to have been few bugs related to it either. When this answer was originally w...
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Alternatives to gprof [closed]

... answered Dec 19 '09 at 5:26 Norman RamseyNorman Ramsey 184k5757 gold badges336336 silver badges517517 bronze badges ...
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How can I change the color of a Google Maps marker?

... answered Mar 18 '10 at 20:00 KevinKevin 12.4k1111 gold badges5353 silver badges8484 bronze badges ...
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What does it mean when an HTTP request returns status code 0?

...r any other type of HTTP network request, fail with an HTTP status code of 0? 15 Answers ...
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Sort array of objects by single key with date value

... use Array.sort. Here's an example: var arr = [{ "updated_at": "2012-01-01T06:25:24Z", "foo": "bar" }, { "updated_at": "2012-01-09T11:25:13Z", "foo": "bar" }, { "updated_at": "2012-01-05T04:13:24Z", "foo": "bar" } ] arr.sort(function(a, b) { v...