大约有 31,500 项符合查询结果（耗时：0.0380秒） [XML]
How to make JavaScript execute after page load?
...ages, and subframes to finish loading. At this stage you could programmatically optimize loading of images and css based on user device or bandwidth speed.
Executes after DOM is loaded (before img and css):
document.addEventListener("DOMContentLoaded", function(){
//....
});
Note: Synchr...
Enum type constraints in C# [duplicate]
What is the reason behind C# not allowing type constraints on Enum 's? I'm sure there is a method behind the madness, but I'd like to understand why it's not possible.
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Making a mocked method return an argument that was passed to it
...entAt(0, Bar.class)). And you can just as well use a method reference and call real method.
– Paweł Dyda
Jan 29 '15 at 13:17
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Drop shadow for PNG image in CSS
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A little late to the party, but yes, it is totally possible to create "true" dynamic drop shadows around alpha masked PNGs, using a combination of dropshadow-filter (for Webkit), SVG (for Firefox) and DX filters for IE.
.shadowed {
-webkit-filter: drop-shadow(12px 1...
How to add a button to a PreferenceScreen?
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actually this does not display a button at all, which will confuse the user and isn't what the OP asked. correct answer to actually show a button is Nicolas's.
– mutable2112
May 5 '15 at 18:...
Detect if device is iOS
... are changed and differentiating between iPad and MacOS seems possible, so all answers below needs to take that into account now.
This might be the shortest alternative that also covers iOS 13:
function iOS() {
return [
'iPad Simulator',
'iPhone Simulator',
'iPod Simulator',
'iPad'...
How to remove multiple indexes from a list at the same time? [duplicate]
...t-in operation to remove a number of indexes at once.
Your example is actually a contiguous sequence of indexes, so you can do this:
del my_list[2:6]
which removes the slice starting at 2 and ending just before 6.
It isn't clear from your question whether in general you need to remove an arbitr...
Differences between cookies and sessions?
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"passing it in a URL (which poses a security risk)." actually both approach have security risks (different ones). Secret-ID in the URL can be made secure if done properly, and if the user understands that the URL is secret and cannot be posted in a public forum ever.
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JavaScript Nested function
...ion in the same way it would change the scope of a variable. This is especially important for use with closures to reduce total global namespace pollution.
The functions defined within another function won't be accessible outside the function unless they have been attached to an object that is acce...
Set multiple properties in a List ForEach()?
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All you need to do is introduce some brackets so that your anonymous method can support multiple lines:
list.ForEach(i => { i.a = "hello!"; i.b = 99; });
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