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How to do associative array/hashing in JavaScript
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11 Answers
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Create PostgreSQL ROLE (user) if it doesn't exist
How do I write an SQL script to create a ROLE in PostgreSQL 9.1, but without raising an error if it already exists?
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Removing multiple keys from a dictionary safely
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Is there any Rails function to check if a partial exists?
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Currently, I'm using the following in my Rails 3/3.1 projects:
lookup_context.find_all('posts/_form').any?
The advantage over other solutions I've seen is that this will look in all view paths instead of just your rails root. This is important to me as I have a lot of rail...
浅谈TCP优化 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...决于BDP的大小，也就是带宽和延迟的乘积。假设带宽是 100Mbps，延迟是 100ms，那么计算过程如下：
BDP = 100Mbps * 100ms = (100 / 8) * (100 / 1000) = 1.25MB
此问题下如果想最大限度提升吞度量，接收窗口「rwnd」的大小不应小于 1.25MB。说...
kernel stack and user space stack
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What's the difference between kernel stack and user stack ?
In short, nothing - apa...
mingw-w64 threads: posix vs win32
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GCC comes with a compiler runtime library (libgcc) which it uses for (among other things) prov...
Which browsers support ?
On December 1, 2009, Google announced support for asynchronous Google Analytics tracking .
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How to execute a Ruby script in Terminal?
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Just call: ruby your_program.rb
or
start your program with #!/usr/bin/env ruby,
make your fil...