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Linux下安装项目管理工具Redmine - 开源 & Github - 清泛网 - 专注C/C++及内核技术
...、RubyGems安装
# wget http://rubyforge.org/frs/download.php/60718/rubygems-1.3.5.tgz
# tar zxvf rubygems-1.3.5.tgz
# cd rubygems-1.3.5
# ruby setup.rb
3、Rake安装
# gem install rake //直接使用gem命令安装rake.
//也可以下载安装地址：http...
Create boolean column in MySQL with false as default value?
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205
You have to specify 0 (meaning false) or 1 (meaning true) as the default. Here is an example:
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Getting the current page
...rollView.frame.size.width;
NSInteger page = (scrollView.contentOffset.x + (0.5f * width)) / width;
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Does const mean thread-safe in C++11?
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This is what the Standard Language has to say on thread-safety:
[1.10/4]
Two expression evaluations conflict if one of them modifies a memory location (1.7) and the other one accesses or modifies the same memory location.
[1.10/21]
The execution of a program contains a data race if it contain...
Is gcc std::unordered_map implementation slow? If so - why?
...gcc-4.7 is broken (or my installation, which is an installation of gcc-4.7.0 on Ubuntu - and another installation which is gcc 4.7.1 on debian testing).
I will submit a bug report.. until then: DO NOT use std::unordered_map with gcc 4.7!
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How to send only one UDP packet with netcat?
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205
If you are using bash, you might as well write
echo -n "hello" >/dev/udp/localhost/8000
a...
bool operator ++ and --
...1) or true (if the integral value is anything else - notably this includes 0 [false] and 2 or more [true]).
So as a short-hand ++ worked, and -- didn't.
++ is allowed on bools for compatibility with this, but its use is deprecated in the standard and it was removed in C++17.
This assumes that I onl...
Django - filtering on foreign key properties
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answered Dec 30 '09 at 18:07
FragsworthFragsworth
26.4k2424 gold badges7373 silver badges9595 bronze badges
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Rails: Get Client IP address
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answered Dec 16 '10 at 21:35
loosecannonloosecannon
7,30333 gold badges2929 silver badges4343 bronze badges
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Can C++ code be valid in both C++03 and C++11 but do different things?
Is it possible for C++ code to conform to both the C++03 standard and the C++11 standard, but do different things depending on under which standard it is being compiled?
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