大约有 47,000 项符合查询结果(耗时:0.0434秒) [XML]

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What is a callback function?

... somewhere you can get to it Execution comes back to where it was in [1] Now suppose factorial took a really long time, because you're giving it huge numbers and it needs to run on some supercomputing cluster somwhere. Let's say you expect it to take 5 minutes to return your result. You could: K...
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Why there can be only one TIMESTAMP column with CURRENT_TIMESTAMP in DEFAULT clause?

...TAMP and ON UPDATE CURRENT_TIMESTAMP clauses. In addition, these clauses now can be used with DATETIME column definitions. For more information, see Automatic Initialization and Updating for TIMESTAMP and DATETIME. http://dev.mysql.com/doc/relnotes/mysql/5.6/en/news-5-6-5.html ...
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how to solve “ruby installation is missing psych” error?

...ven though it was successfully installed, it complained about libyaml. and now every time i wanna install a gem (say rails) this warning shows up: ...
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JavaScript: How to pass object by value?

...var key in obj) temp[key] = clone(obj[key]); return temp; } Now you can you use like this: (function(x){ var obj = clone(x); obj.foo = 'foo'; obj.bar = 'bar'; })(o) share | ...
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Optional query string parameters in ASP.NET Web API

... This issue has been fixed in the regular release of MVC4. Now you can do: public string GetFindBooks(string author="", string title="", string isbn="", string somethingelse="", DateTime? date= null) { // ... } and everything will work out of the box. ...
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Reset identity seed after deleting records in SQL Server

... supported in previous versions of the Azure SQL Database but is supported now. Thanks to Solomon Rutzky the docs for the command are now fixed. share | improve this answer | ...
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How to list all tags along with the full message in git?

...to do something more than what this question is asking. But it is good to know that for certain situations the -l is needed. – still_dreaming_1 Jul 2 '15 at 15:30 ...
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A fast method to round a double to a 32-bit int explained

...le is represented like this: and it can be seen as two 32-bit integers; now, the int taken in all the versions of your code (supposing it's a 32-bit int) is the one on the right in the figure, so what you are doing in the end is just taking the lowest 32 bits of mantissa. Now, to the magic num...
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Appending a vector to a vector [duplicate]

...o use reserve if you are repeatedly inserting into a vector for which you know the final size, and that size is large. Otherwise, I'd let the STL grow your vector as needed. – moodboom Sep 10 '13 at 16:24 ...
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How do I start Mongo DB from Windows?

...on localhost:27017 Your MongoDB is started and connected with RoboMongo (now Robo 3T) - a third party GUI tool share | improve this answer | follow | ...