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How to convert Milliseconds to “X mins, x seconds” in Java?
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Use the java.util.concurrent.TimeUnit class:
String.format("%d min, %d sec",
TimeUnit.M...
Use HTML5 to resize an image before upload
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162
Here is what I ended up doing and it worked great.
First I moved the file input outside of th...
Unicode equivalents for \w and \b in Java regular expressions?
...ious other properties, too. It now tracks The Unicode Standard, in both RL1.2 and RL1.2a from UTS#18: Unicode Regular Expressions. This is an exciting and dramatic improvement, and the development team is to be commended for this important effort.
Java’s Regex Unicode Problems
The problem wit...
How to read multiple text files into a single RDD?
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10 Answers
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Active
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How to check if there's nothing to be committed in the current branch?
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241
An alternative to testing whether the output of git status --porcelain is empty is to test each ...
How to use Regular Expressions (Regex) in Microsoft Excel both in-cell and loops
...re used for Pattern Matching.
To use in Excel follow these steps:
Step 1: Add VBA reference to "Microsoft VBScript Regular Expressions 5.5"
Select "Developer" tab (I don't have this tab what do I do?)
Select "Visual Basic" icon from 'Code' ribbon section
In "Microsoft Visual Basic for Applicat...
How do I do top 1 in Oracle?
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261
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...
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...