大约有 40,000 项符合查询结果（耗时：0.0579秒） [XML]
How can I check if a command exists in a shell script? [duplicate]
... only)
You can put any of them to your if clause. According to my tests (https://www.topbug.net/blog/2016/10/11/speed-test-check-the-existence-of-a-command-in-bash-and-zsh/), the 1st and 3rd method are recommended in bash and the 5th method is recommended in zsh in terms of speed.
...
$.focus() not working
...reventDefault() to keep the focus from leaving the HTMLElement.
Source: https://developer.mozilla.org/en/docs/Web/API/HTMLElement/focus
share
|
improve this answer
|
foll...
Can I use the range operator with if statement in Swift?
...tains() operator too, until found that its implementation is inefficient - https://oleb.net/blog/2015/09/swift-ranges-and-intervals/
We can represent the condition x < 0 using a range:
(Int.min..<0).contains(x) is exactly equivalent. It is vastly slower,
though. The default implementat...
Get loop counter/index using for…of syntax in JavaScript
...eys() is not available for IE version <9, you should use Polyfill code.
https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Global_Objects/Object/keys
share
|
improve this answer
...
How to fix error “Updating Maven Project”. Unsupported IClasspathEntry kind=4?
...5.0 which is available for Eclipse Kepler (4.3) and Luna (4.4)
Please see https://bugs.eclipse.org/bugs/show_bug.cgi?id=374332#c14
The problem is caused by the fact that STS (the Spring IDE/Eclipse), as well Eclipse and other Eclipse based IDE's, use the m2e(clipse) plugin but that eclipse:eclipse...
What is the difference between Type and Class?
...een subtypes and subclass probably helps to understand that issue as well:
https://www.cs.princeton.edu/courses/archive/fall98/cs441/mainus/node12.html
share
|
improve this answer
|
...
Pretty-print an entire Pandas Series / DataFrame
... this one. You can even configure it to load every time you start IPython: https://ipython.org/ipython-doc/1/config/overview.html
def print_full(x):
pd.set_option('display.max_rows', len(x))
print(x)
pd.reset_option('display.max_rows')
As for coloring, getting too elaborate with color...
Reminder - \r\n or \n\r?
...mp; Mac OS X: \n, 0A, 10
Macintosh (OS 9): \r, 0D, 13
More details here: https://ccrma.stanford.edu/~craig/utility/flip/
When in doubt, use any freeware hex viewer/editor to see how a file encodes its new line.
For me, I use following guide to help me remember: 0D0A = \r\n = CR,LF = carriage ret...
Multiple types were found that match the controller named 'Home'
...
If you are getting this from an Azure App Service, go to https://<your_app_name_here>.scm.azurewebsites.net/DebugConsole to log in and delete files.
– Tom Blodget
Jun 3 '16 at 14:36
...
Best way to alphanumeric check in JavaScript
... from 0 to 9 OR from a to z.
More information on Javascript regexen here:
https://developer.mozilla.org/en/JavaScript/Guide/Regular_Expressions
share
|
improve this answer
|
...