大约有 15,500 项符合查询结果（耗时：0.0225秒） [XML]
How to inspect Javascript Objects
... This gives me 'undefined' as output. I am trying to debug karma tests.
– Alex C
Mar 27 '15 at 19:41
1
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Why are my PowerShell scripts not running?
...unning the command Set-ExecutionPolicy bypass -File C:\Users\david\Desktop\test.ps1 and got an error message. There is no -File option for this command.
– David Spector
Jul 9 '19 at 11:37
...
Pycharm does not show plot
...
I test in my version of Pycharm (Community Edition 2017.2.2), you may need to announce both plt.interactive(False) and plt.show(block=True) as following:
import numpy as np
import matplotlib.pyplot as plt
x = np.linspace(0, 6...
How to use regex in String.contains() method in Java
...
public static void main(String[] args) {
String test = "something hear - to - find some to or tows";
System.out.println("1.result: " + contains("- to -( \\w+) som", test, null));
System.out.println("2.result: " + contains("- to -( \\w+) som", test, 5));
}
static bo...
How do you know a variable type in java?
...s very bad , So code...)
How to get variable's type?
Up's :
String str = "test";
String type = str.getClass().getName();
value: type = java.lang.String
this method :
str.getClass().getSimpleName();
value:String
now example:
Object o = 1;
o.getClass().getSimpleName();
value:Integer
...
What's Alternative to Singleton
...the singleton. We did see some benefits of not using singleton in the unit testing because we can test different configurations all at once.
...
How do I get a Cron like scheduler in Python? [closed]
... self.action(*self.args, **self.kwargs)
(Note: Not thoroughly tested)
Then your CronTab can be specified in normal python syntax as:
c = CronTab(
Event(perform_backup, 0, 2, dow=6 ),
Event(purge_temps, 0, range(9,18,2), dow=range(0,5))
)
This way you get the full power of Python...
Convert Enum to String
...d by the string in the compiled result, which in turn means this is the fastest way possible.
Any use of enum names does interfere with code obfuscation, if you consider obfuscation of enum names to be worthwhile or important - that's probably a whole other question.
...
jQuery first child of “this”
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I've added jsperf test to see the speed difference for different approaches to get the first child (total 1000+ children)
given, notif = $('#foo')
jQuery ways:
$(":first-child", notif) - 4,304 ops/sec - fastest
notif.children(":first") - 653 ...
Does git return specific return error codes?
...
I set-up a test to fail. This is what I got:
$ git merge newbranch
Auto-merging test.txt
CONFLICT (content): Merge conflict in test.txt
Automatic merge failed; fix conflicts and then commit the result.
$ echo $?
1
Git returns 0 when...