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What is the difference between “long”, “long long”, “long int”, and “long long int” in C++?
..., and long was 32; int could either be 16 or 32. Note for some platforms (esp. the 68000) both 16-bit and 32-bit int were quite common, and indeed some compilers had options to support either. Code which needed to be portable was thus expected to use short or long in preference to int.
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Command substitution: backticks or dollar sign / paren enclosed? [duplicate]
...epeat each section of the poster's text, block-quoted, and followed by my response.
What's the preferred syntax, and why? Or are they pretty much interchangeable?
I would say that the $(some_command) form is preferred over the `some_command` form. The second form, using a pair of backquotes (t...
Assign one struct to another in C
... push %ebp
401051: 89 e5 mov %esp,%ebp
401053: a1 20 20 40 00 mov 0x402020,%eax
401058: a3 30 20 40 00 mov %eax,0x402030
40105d: a1 24 20 40 00 mov 0x402024,%eax
401062: a3 34 20 40 00 mov %e...
Most efficient way to check for DBNull and then assign to a variable?
... In virtually all cases == is going to be equivalent to ReferenceEquals (esp. to DBNull) and it's much more readable. Use @Marc Gravell's optimization if you want, but I'm with him -- probably not going to help much. BTW, reference equality ought to always beat type checking.
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Can I change the height of an image in CSS :before/:after pseudo-elements?
...now the intrinsic dimensions of the image, and it leaves you with some whitespace, which I can't get rid of ATM.
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How to replace case-insensitive literal substrings in Java
...gant perhaps as other approaches but it's pretty solid and easy to follow, esp. for people newer to Java. One thing that gets me about the String class is this: It's been around for a very long time and while it supports a global replace with regexp and a global replace with Strings (via CharSequen...
Comparison of CI Servers? [closed]
...ching for a comparison of different
continuous integration (CI) Servers (esp. focusing
on .NET) and couldn't find any.
13...
Forward an invocation of a variadic function in C
...; \
asm volatile ( \
"mov %2, %%esp \n\t" \
"call *%1 \n\t" \
: "=a"(va_wrap_ret) \
: "r" (func), \
"r"(va_wrap_stack) \
: "%ebx", "%ecx", "%edx" \
)...
搭建高可用mongodb集群（三）—— 深入副本集内部机制 - 大数据 & AI - 清...
...以触发。
初始化一个副本集时。
副本集和主节点断开连接，可能是网络问题。
主节点挂掉。
选举还有个前提条件，参与选举的节点数量必须大于副本集总节点数量的一半，如果已经小于一半了所有节点保持只读状态。
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What are some common uses for Python decorators? [closed]
... Possibly justified, but decorators are inherently confusing, esp. to first-year noobs who come behind you and try to mod your code. Avoid this with simplicity: just have do_something() enclose its code in a block under 'with lock:' and everyone can clearly see your purpose. Decorato...