大约有 20,000 项符合查询结果（耗时：0.0424秒） [XML]
Display current date and time without punctuation
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A simple example in shell script
#!/bin/bash
current_date_time="`date +%Y%m%d%H%M%S`";
echo $current_date_time;
With out punctuation format :- +%Y%m%d%H%M%S
With punctuation :- +%Y-%m-%d %H:%M:%S
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Regular expression \p{L} and \p{N}
...he category "letter".
\p{N} matches any kind of numeric character in any script.
Source: regular-expressions.info
If you're going to work with regular expressions a lot, I'd suggest bookmarking that site, it's very useful.
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How to execute an external program from within Node.js?
...wn;
var prc = spawn('java', ['-jar', '-Xmx512M', '-Dfile.encoding=utf8', 'script/importlistings.jar']);
//noinspection JSUnresolvedFunction
prc.stdout.setEncoding('utf8');
prc.stdout.on('data', function (data) {
var str = data.toString()
var lines = str.split(/(\r?\n)/g);
console.log(l...
UIView frame, bounds and center
...space is: bounds.size.width/2+origin.x" -- why is this the case? Since the title says in its own coordinate space, I would say it is: bounds.size.width/2+bounds.origin.x?? Isn't it??
– user2568508
Aug 6 '13 at 11:08
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Difference between java.exe and javaw.exe
...es wait until the program completes. It can be used safely as part of .bat script for example, and it will wait. However, when you manually start non-console programs from cmd.exe, the cmd.exe will not wait and return to command prompt immediately. Try it with notepad.exe vs ping 8.8.8.8
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What's the difference between subprocess Popen and call (how can I use them)?
...you can still set the process' output, environmental variables, etc., your script waits for the program to complete, and call returns a code representing the process' exit status.
returncode = call(*args, **kwargs)
is basically the same as calling
returncode = Popen(*args, **kwargs).wait()
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Regex for string contains?
...ling but can't get a straight example of such a regex. This is for a build script but has no bearing to any particular programming language.
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Factors in R: more than an annoyance?
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What a snarky title!
I believe many estimation functions allow you to use factors to easily define dummy variables... but I don't use them for that.
I use them when I have very large character vectors with few unique observations. This ...
How do you create a dropdownlist from an enum in ASP.NET MVC?
...(typeof (DescriptionAttribute), true).FirstOrDefault()
let title = attribute == null ? item.ToString() : ((DescriptionAttribute) attribute).Description
select new SelectListItem
{
Value = item.ToString(),
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Default html form focus without JavaScript
... possible to set the default input focus on an HTML form without using JavaScript, for example:
5 Answers
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