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Awk学习笔记 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...t( string, array )
实例：
$ awk '{ split( "20:18:00", time, ":" ); print time[2] }'
上例把时间按冒号分割到time数组内，并显示第二个数组元素18。
14.8.2. 时间函数
systime函数返回从1970年1月1日开始到当前时间(...
Passing a String by Reference in Java?
... faster that s += "..." since it doesn't allocate new String objects every time. In fact when you write Java code like s = "Hello " + name, then the compiler will generate byte code which creates a StringBuilder and calls append() two times.
– Aaron Digulla
May...
What is the maximum possible length of a .NET string?
...e. Useful if you know you're going to be using 10,000,000 entries ahead of time, allowing you to ignore some of the crunch.
– Kyle Baran
Aug 29 '14 at 15:53
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Symbolic link to a hook in git
.../hooks so I don't have to copy the file from one folder to the other every time someone changes it so I tried:
6 Answers
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How to change a nullable column to not nullable in a Rails migration?
...there are null rows in that database? I'm ok with setting those columns to Time.now if they're currently null.
8 Answers
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How to sort a file, based on its numerical values for a field?
...! This is wired, because I looked over its man page back and forth several times and I didnt see that option. Ah, I was at a simplified man page. Damn!
– lukmac
Jan 31 '11 at 21:31
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How to elegantly ignore some return values of a MATLAB function?
... was even released, so @ManWithSleeve's answer wouldn't have worked at the time. Now, of course, that's the right approach.
– Jason S
Sep 20 '11 at 14:37
2
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How can I generate random alphanumeric strings?
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The following line is more memory (and thus time) efficient than the given one return new string(Enumerable.Range(1, length).Select(_ => chars[random.Next(chars.Length)]).ToArray());
– Tyson Williams
Nov 11 '16 at 18:06
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What is in your .vimrc? [closed]
...but instead with jk, as I think hitting jk is faster than hitting jj. Only times this has affected me is typing out the alphabet, so maybe kj you be better.
– David Miani
Aug 2 '09 at 16:02
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RegEx to extract all matches from string using RegExp.exec
...ari, and Opera. Seems like it was drafted in December 2018 so give it some time to reach all browsers, but I trust it will get there.
The built-in matchAll function is nice because it returns an iterable. It also returns capturing groups for every match! So you can do things like
// get the letter...