大约有 43,000 项符合查询结果（耗时：0.0250秒） [XML]
How can I check whether a radio button is selected with JavaScript?
...otypeJS makes it very easy.
Here's a function that will return true if at least one radio button is selected somewhere on the page. Again, this might need to be tweaked depending on your specific HTML.
function atLeastOneRadio() {
return ($('input[type=radio]:checked').size() > 0);
}
F...
C++ valarray vs. vector
...array is also supposed to eliminate any possibility of aliasing, which (at least theoretically) lets the compiler improve speed because it's more free to store values in registers. In reality, however, I'm not at all sure that any real implementation takes advantage of this to any significant degree...
Best practice for embedding arbitrary JSON in the DOM?
...h note that with single quotes for the key name, JSON.parse won't work (at least the native Google Chrome JSON.parse won't). The JSON spec requires double quotes. But that's easy enough to fix using entities like ...<unicorns>:....
– Ben Lee
Feb 1...
What is the meaning of “POSIX”?
... Your comment is flawed, as Microsoft's market share on desktops, at least, makes it "what the world follows".
– Jed Smith
Nov 23 '09 at 1:23
29
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Why is React's concept of Virtual DOM said to be more performant than dirty model checking?
...
Actually I have read some articles too, so I now (at least in general) how it works, I just wanted to figure out why it can be more efficient than dirty check of model. And 1) Yup, it does not compare models but does compare much bigger virtual dom 2) Dirty-check of model provi...
Facebook Graph API v2.0+ - /me/friends returns empty, or only friends who also use my application
... if (dataArray.length() > 0) {
// Ensure the user has at least one friend ...
for (int i = 0; i < dataArray.length(); i++) {
JSONObject jsonObject = dataArray.optJSONObject(i);
FacebookFriend facebookFriend = new FacebookFriend(jsonOb...
Bring element to front using CSS
...
The 2 parts of your answer aren't related (at least with no other details). First part is a solution because al other properties equal latter element in HTML code is displayed above previous ones. Second part is some comment about how z-index has some effect.
...
What are the Ruby Gotchas a newbie should be warned about? [closed]
...that it was not as simple as I had expected. More precisely, the "rule of least-surprise" did not seem very respected to me (of course this is quite subjective). For example:
...
Convert UTC/GMT time to local time
.... And you want to know what local time that was.
1. There are probably at least three 'locals' involved. Local may mean Honolulu, or it may mean where your computer is located, or it may mean the location where your customer is located.
2. If you use the built-in functions to do the conversion, it...
Change Screen Orientation programmatically using a Button
...oth orientations available is important to the user.
Note: For phones, at least several that I've checked, it only allows the "right side up" portrait mode, however, SENSOR_PORTRAIT works properly on tablets.
Note: this feature was introduced in API Level 9, so if you must support 8 or lower (not ...