大约有 33,000 项符合查询结果（耗时：0.0274秒） [XML]
How to force an entire layout View refresh?
...wer the question: Use invalidate():
public void invalidate ()
Since: API Level 1
Invalidate the whole view. If the view is visible, onDraw(Canvas) will be called at some point in the future. This must be called from a UI thread. To call from a non-UI thread, call postInvalidate().
ViewG...
How to select rows from a DataFrame based on column values?
...sitional indexing (df.iloc[...])
Label indexing (df.xs(...))
df.query(...) API
Below I show you examples of each, with advice when to use certain techniques. Assume our criterion is column 'A' == 'foo'
(Note on performance: For each base type, we can keep things simple by using the pandas API or ...
How do I determine if a port is open on a Windows server? [closed]
...ted to check as I think this already answers my question. When I do telnet api-3t.sandbox.paypal.com 443 I get Connecting to api-3t.sandbox.paypal.com...Could not open connection to the host on port 443: Connect failed Is this because the firewall is blocking it?
– Popeye
...
Android: Temporarily disable orientation changes in an Activity
... to ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE it will flip upside down. In API 9, ActivityInfo introduces SCREEN_ORIENTATION_REVERSE_LANDSCAPE constant, but I don't see a way to detect such orientation through Configuration class.
– Błażej Czapp
Apr 20 '12 at...
Why does the month argument range from 0 to 11 in JavaScript's Date constructor?
...
In short, it took 18 years for Java to get a correctly designed date/time API built-in, but JavaScript is still stuck back in the dark ages. We do indeed have excellent libraries like Moment.js, date-fns, and js-joda. But as of now, there is nothing more than Date built-in to the language. Hopef...
The differences between .build, .create, and .create! and when should they be used?
...te alternative can be useful in controllers where respond_with is used for API (JSON/XML) responses. In this case the existence of errors on the object will cause the errors to be returned in the response with a status of unprocessable_entity, which is exactly what you want from an API.
I would alw...
How to take screenshot of a div with JavaScript?
...t();
endif;?>
<script type='text/javascript' src='http://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js?ver=1.7.2'></script>
<canvas id="canvas" width="300" height="150"></canvas>
<button id="btn">Save</button>
<script>
$(document).ready(fu...
Does Internet Explorer 8 support HTML 5?
...
IE8 beta 2 supports two APIs from HTML5: cross-document messaging and non-SQL storage.
IE8 beta 2 doesn’t implement the HTML5 parsing algorithm or the new elements (no <canvas> or <video> support).
There are also bug fixes that align...
Fragment MyFragment not attached to Activity
.../reference/android/app/… ...there's also isDetached(), that was added on API level 13
– Lucas Jota
Mar 21 '14 at 12:42
...
How to prevent a jQuery Ajax request from caching in Internet Explorer?
...hat cache should be doing behind the scenes as per this information from - api.jquery.com/jquery.ajax cache (default: true, false for dataType 'script' and 'jsonp') Type: Boolean If set to false, it will force requested pages not to be cached by the browser. N...