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C语言结构体里的成员数组和指针 - c++1y / stl - 清泛IT社区，为创新赋能！
...ash才怪。于是，你一定会有如下的问题：1）为什么不是 13行if语句出错？f.a被初始化为空了嘛，用空指针访问成员变量为什么不crash？2）为什么会访问到了0x4的地址？靠，4是怎么出来的？3）代码中的第4行，char s[0] 是个什么东...
Redefining NULL
...casting a 0 constant to a pointer value must result in a NULL pointer (§6.3.2.3/3), and evaluating the null 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...
Self-references in object literals / initializers
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How to get everything after a certain character?
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The strpos() finds the offset of the underscore, then substr grabs everything from that index ...
What exactly does an #if 0 … #endif block do?
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edited May 17 '10 at 21:31
answered May 17 '10 at 21:24
D...
How to supply value to an annotation from a Constant java
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Compile constants can only be primitives and Strings:
15.28. Constant Expressions
A compile-ti...
What is the Swift equivalent of isEqualToString in Objective-C?
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With Swift you don't need anymore to check the equality with isEqualToString
You can now use =...
JavaScript style for optional callbacks
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139
I personally prefer
typeof callback === 'function' && callback();
The typeof command ...
With arrays, why is it the case that a[5] == 5[a]?
As Joel points out in Stack Overflow podcast #34 , in C Programming Language (aka: K & R), there is mention of this property of arrays in C: a[5] == 5[a]
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Error installing mysql2: Failed to build gem native extension
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On Ubuntu/Debian and other distributions using aptitude:
sudo apt-get install libmysql-ruby lib...