大约有 48,000 项符合查询结果(耗时:0.0687秒) [XML]

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PHP memory profiling

...page's memory usage? For example, to see how much memory my data is using, and/or which function calls are allocating the most memory. ...
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Unique combination of all elements from two (or more) vectors

... this maybe what you are after > expand.grid(a,b) Var1 Var2 1 ABC 2012-05-01 2 DEF 2012-05-01 3 GHI 2012-05-01 4 ABC 2012-05-02 5 DEF 2012-05-02 6 GHI 2012-05-02 7 ABC 2012-05-03 8 DEF 2012-05-03 9 GHI 2012-05-03 10 ABC 2012-05-04 11...
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Why should you use an ORM? [closed]

If you are motivate to the "pros" of an ORM and why would you use an ORM to management/client, what are those reasons would be? ...
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Writing unit tests in Python: How do I start? [closed]

I completed my first proper project in Python and now my task is to write tests for it. 7 Answers ...
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Objective-C: Where to remove observer for NSNotification?

I have an objective C class. In it, I created a init method and set up a NSNotification in it 14 Answers ...
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Custom method names in ASP.NET Web API

...he WCF Web API to the new ASP.NET MVC 4 Web API. I have a UsersController, and I want to have a method named Authenticate. I see examples of how to do GetAll, GetOne, Post, and Delete, however what if I want to add extra methods into these services? For instance, my UsersService should have a method...
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byte + byte = int… why?

...; So, there is no + operation on bytes, bytes are first cast to integers and the result of addition of two integers is a (32-bit) integer. share | improve this answer | fol...
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What is the difference between a database and a data warehouse?

What is the difference between a database and a data warehouse? 13 Answers 13 ...
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Pointer vs. Reference

... Explain what you mean by arithmetic. A new user may not understand that you want to adjust what the pointer is pointing at. – Martin York Sep 22 '08 at 16:30 7 ...
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Why does Java have transient fields?

...ct. For example, you may have fields that are derived from other fields, and should only be done so programmatically, rather than having the state be persisted via serialization. Here's a GalleryImage class which contains an image and a thumbnail derived from the image: class GalleryImage imple...