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Why do we use arrays instead of other data structures?
...he address to that mailbox.
In C, an array is simply a pointer with an offset, the offset specifies how far in memory to look. This provides O(1) access time.
MyArray [5]
^ ^
Pointer Offset
All other data structures either build upon this, or do not use adjacent memory for sto...
What is the difference between static_cast and C style casting?
Is there any reason to prefer static_cast<> over C style casting? Are they equivalent? Is their any sort of speed difference?
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.c vs .cc vs. .cpp vs .hpp vs .h vs .cxx [duplicate]
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6个变态的C语言Hello World程序 - 创意 - 清泛网 - 专注C/C++及内核技术
6个变态的C语言Hello World程序下面的六个程序片段主要完成这些事情：输出Hello, World混乱C语言的源代码下面的所有程序都可以在GCC下编译通过，只有最后一个需要动用C++...下面的六个程序片段主要完成这些事情：
1、输出Hello, W...
error C2512: “Foo”: 没有合适的默认构造函数可用 - C/C++ - 清泛网 - 专...
error C2512: “Foo”: 没有合适的默认构造函数可用错误信息如下：C: Program Files Microsoft Visual Studio 11.0 VC INCLUDE xmemory0(601) : error C2512: Foo: 没有合适的默认构...错误信息如下：
C:\Program Files\Microsoft Visual Studio 11.0\VC\INCLUDE\xmemory0(60...
rpcndr.h和wtypes.h冲突的解决方法 - C/C++ - 清泛网 - 专注C/C++及内核技术
rpcndr.h和wtypes.h冲突的解决方法当编译出现如下错误时：1>c: program files (x86) microsoft sdks windows v7.0a include rpcndr.h(162): error C2632: char后面的in...当编译出现如下错误时：
1>c:\program files (x86)\microsoft sdks\windows\v7.0a\include\rpcndr.h(162): e...
编译错误 error: ‘typeof’ cannot be used as a function - C/C++ - 清泛网 - 专注C/C++及内核技术
编译错误 error: ‘typeof’ cannot be used as a functionerror-typeof-cannot-be-used-as-a-function编译一些开源的C项目，发现typeof关键字不能被识别，报错：error: ‘typeof’ cannot be used as a function。解决方法：修改C编译选项 -std=gnu99，使用GNU99 ...
Heap vs Binary Search Tree (BST)
...dard library insert benchmark on real hardware
I benchmarked the C++ std::set (Red-black tree BST) and std::priority_queue (dynamic array heap) insert to see if I was right about the insert times, and this is what I got:
benchmark code
plot script
plot data
tested on Ubuntu 19.04, GCC 8.3.0 in ...
How can you check for a #hash in a URL using JavaScript?
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$('#myanchor').click(function(){
window.location.hash = "myanchor"; //set hash
return false; //disables browser anchor jump behavior
});
$(window).bind('hashchange', function () { //detect hash change
var hash = window.location.hash.slice(1); //hash to string (= "myanchor")
//do sth...
iOS start Background Thread
...ect: to spawn a new thread, then the performed selector is responsible for setting up the new thread's autorelease pool, run loop and other configuration details – see "Using NSObject to Spawn a Thread" in Apple's Threading Programming Guide.
You'd probably be better off using Grand Central Dispa...