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Run cron job only if it isn't already running
So I'm trying to set up a cron job as a sort of watchdog for a daemon that I've created. If the daemon errors out and fails, I want the cron job to periodically restart it... I'm not sure how possible this is, but I read through a couple of cron tutorials and couldn't find anything that would do wha...
Best practices/performance: mixing StringBuilder.append with String.concat
I'm trying to understand what the best practice is and why for concatenating string literals and variables for different cases. For instance, if I have code like this
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Bash: Strip trailing linebreak from output
When I execute commands in Bash (or to be specific, wc -l < log.txt ), the output contains a linebreak after it. How do I get rid of it?
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What is a callback?
What's a callback and how is it implemented in C#?
11 Answers
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How to stop/terminate a python script from running?
... IDLE to tokenize text files and it starts to tokeniza 349 text files! How can I stop it? How can I stop a running Python program?
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Performance difference between IIf() and If
In Visual Basic, is there a performance difference when using the IIf function instead of the If statement?
9 Answers
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Android应用开发性能优化完全分析 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...------16ms/帧；
准则：尽量保证每次在16ms内处理完所有的CPU与GPU计算、绘制、渲染等操作，否则会造成丢帧卡顿问题。
从上面可以看出来，所谓的卡顿其实是可以量化的，每次是否能够成功渲染是非常重要的问题，16ms能否完...
Checking network connection
I want to see if I can access an online API, but for that I need to have Internet access.
21 Answers
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Why isn't std::initializer_list a language built-in?
It seems to me that it's quite an important feature of C++11 and yet it doesn't have its own reserved keyword (or something alike).
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How to read a file in Groovy into a string?
I need to read a file from the file system and load the entire contents into a string in a groovy controller, what's the easiest way to do that?
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