大约有 19,000 项符合查询结果（耗时：0.0339秒） [XML]
default select option as blank
...
This should help :
https://www.w3schools.com/tags/att_select_required.asp
<form>
<select required>
<option value="">None</option>
<option value="volvo">Volvo</option>
<option value="saab"&...
Cross-Origin Request Headers(CORS) with PHP headers
...l idea of what is involved. For the nitty-gritty low-down, read:
*
* - https://developer.mozilla.org/en/HTTP_access_control
* - http://www.w3.org/TR/cors/
*
*/
function cors() {
// Allow from any origin
if (isset($_SERVER['HTTP_ORIGIN'])) {
// Decide if the origin in $_SERVE...
How do you add an array to another array in Ruby and not end up with a multi-dimensional result?
...1,2].concat(arr) #=> [1,2,3,4,5]
Lastly, you can use our corelib gem (https://github.com/corlewsolutions/corelib) which adds useful helpers to the Ruby core classes. In particular we have an Array#add_all method which will automatically flatten multidimensional arrays before executing the conc...
Espresso: Thread.sleep( );
...oid adding all the code needed by the accepted answer. And here's a link! https://github.com/SchibstedSpain/Barista
CSS technique for a horizontal line with words in the middle
...ter {
margin-left: 10px
}
<h1>Today</h1>
JSFiddle: https://jsfiddle.net/yoshiokatsuneo/3h1fmj29/
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What is the documents directory (NSDocumentDirectory)?
...
This has changed in iOS 8. See the following tech note: https://developer.apple.com/library/ios/technotes/tn2406/_index.html
The Apple sanctioned way (from the link above) is as follows:
// Returns the URL to the application's Documents directory.
- (NSURL *)applicationDocuments...
Injecting a mock into an AngularJS service
...retty self explanatory, but hopefully it might help others in the future.
https://github.com/tennisgent/QuickMock
describe('NotificationService', function () {
var notificationService;
beforeEach(function(){
notificationService = QuickMock({
providerName: 'Notification...
What's the best visual merge tool for Git? [closed]
...n of Meld for Windows is the most recent release, available as an MSI from https://meldmerge.org"
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How do you check if a JavaScript Object is a DOM Object?
... contrast, this answer works for HTML well as SVG.
See it in action here: https://jsfiddle.net/eLuhbu6r/
function isElement(element) {
return element instanceof Element || element instanceof HTMLDocument;
}
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Inner class within Interface
...lementation to interface methods through an inner class as described here: https://stackoverflow.com/a/3442218/454667 (to overcome the problem of single-class-inheritance).
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