大约有 40,000 项符合查询结果(耗时:0.0406秒) [XML]

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What is an SDL renderer?

... SDL_Window SDL_Window is the struct that holds all info about the Window itself: size, position, full screen, borders etc. SDL_Renderer SDL_Renderer is a struct that handles all rendering. It is tied to a SDL_Window so it can only render within that SDL_Window. It als...
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Are loops really faster in reverse?

I've heard this quite a few times. Are JavaScript loops really faster when counting backward? If so, why? I've seen a few test suite examples showing that reversed loops are quicker, but I can't find any explanation as to why! ...
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Redefining NULL

...ull pointer as a boolean must be false. This can be a bit awkward if you really do want a zero address, and NULL is not the zero address. Nevertheless, with (heavy) modifications to the compiler and standard library, it's not impossible to have NULL be represented with an alternate bit pattern whil...
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jQuery or javascript to find memory usage of page

... 2015 Update Back in 2012 this wasn't possible, if you wanted to support all major browsers in-use. Unfortunately, right now this is still a Chrome only feature (a non-standard extension of window.performance). window.performance.memory Browser support: Chrome 6+ 2012 Answer Is there a w...
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Is Python interpreted, or compiled, or both?

...uage but a property of the implementation. For most languages, most if not all implementations fall in one category, so one might save a few words saying the language is interpreted/compiled too, but it's still an important distinction, both because it aids understanding and because there are quite ...
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How do I split a string so I can access item x?

... This works but allocates a lot of memory and wastes CPU. – jjxtra May 26 '15 at 16:56 2 ...
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Why does Java's hashCode() in String use 31 as a multiplier?

... i == (i << 5) - i. Modern VMs do this sort of optimization automatically. (from Chapter 3, Item 9: Always override hashcode when you override equals, page 48) share | improve this answer ...
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What's the best way to check if a String represents an integer in Java?

I normally use the following idiom to check if a String can be converted to an integer. 38 Answers ...
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What does 'synchronized' mean?

... The synchronized keyword is all about different threads reading and writing to the same variables, objects and resources. This is not a trivial topic in Java, but here is a quote from Sun: synchronized methods enable a simple strategy for prevent...
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the item you requested is not available for purchase

... Make sure to upload the signed APK to developer console. Make sure to install the signed APK on your device not launch the app in the debugger. Make sure to create a test account in your developer console. Setup you testing account Make sure to sign in your device with your test account. In a cas...