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How do I do top 1 in Oracle?
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If you want just a first selected row, you can:
select fname from MyTbl where rownum = 1
You ...
PHP Function with Optional Parameters
I've written a PHP function that can accepts 10 parameters, but only 2 are required. Sometimes, I want to define the eighth parameter, but I don't want to type in empty strings for each of the parameters until I reach the eighth.
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The tilde operator in Python
...complement representation of the integer are reversed (as in b <- b XOR 1 for each individual bit), and the result interpreted again as a twos-complement integer. So for integers, ~x is equivalent to (-x) - 1.
The reified form of the ~ operator is provided as operator.invert. To support this o...
How to check if there's nothing to be committed in the current branch?
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An alternative to testing whether the output of git status --porcelain is empty is to test each ...
How to convert a table to a data frame
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edited Nov 29 '16 at 20:39
Jaap
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20个命令行工具监控 Linux 系统性能 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...际原因。这些监控命令足够你选择适合你的监控场景。
1. top —Linux系统进程监控
top 命令是性能监控程序，它可以在很多 Linux/Unix 版本下使用，并且它也是 Linux 系统管理员经常使用的监控系统性能的工具。Top 命令可以定期显...
Random record from MongoDB
I am looking to get a random record from a huge (100 million record) mongodb .
26 Answers
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How do you read CSS rule values with JavaScript?
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How to determine the Boost version on a system?
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Ruby: How to turn a hash into HTTP parameters?
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