大约有 18,400 项符合查询结果（耗时：0.0347秒） [XML]
how to POST/Submit an Input Checkbox that is disabled?
... value will not appear into POST values. One of the strategy is to add an hidden field holding checkbox's value within the same form and read value back from that field
Simply change disabled to readonly
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Always pass weak reference of self into block in ARC?
... This isn't a problem, for example:
[myArray enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop){
[self doSomethingWithObject:obj];
}];
The block retains self, but self doesn't retain the block. If one or the other is released, no cycle is created and everything gets deallocated a...
How can I save an image to the camera roll?
... nil, nil, nil);
Edit:
//ViewController.m
- (IBAction)onClickSavePhoto:(id)sender{
UIImageWriteToSavedPhotosAlbum(imageToBeSaved, nil, nil, nil);
}
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Conveniently map between enum and int / String
...return map.get(num);
}
}
This solution is nice and doesn't require 'fiddling with reflection' because it's based on the fact that all enum types implicitly inherit the Enum interface.
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Why is the shovel operator (
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Proof:
a = 'foo'
a.object_id #=> 2154889340
a << 'bar'
a.object_id #=> 2154889340
a += 'quux'
a.object_id #=> 2154742560
So << alters the original string rather than creating a new one. The reason for this is that in ruby a += b...
Javascript - sort array based on another array
...oduct1, product2) => { const index1 = manualSort.indexOf(product1.id); const index2 = manualSort.indexOf(product2.id); return ( (index1 > -1 ? index1 : Infinity) - (index2 > -1 ? index2 : Infinity) ); });
– Freshollie
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jQuery find events handlers registered with an object
...ent of a button. In the Chrome console it showed handler: function () { inside the click property. I had to double click on the function part for it to expand and show the full contents of the function.
– Jim
Feb 9 '15 at 10:34
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Set padding for UITextField with UITextBorderStyleNone
...by doing that
let paddingView: UIView = UIView(frame: CGRect(x: 0, y: 0, width: 5, height: 20))
textField.leftView = paddingView
textField.leftViewMode = .always
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When to use a key/value store such as Redis instead/along side of a SQL database?
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I did a quick Google search with that tutorial site URL and came across this as a top hit - slideshare.net/dvirsky/introduction-to-redis-version-2
– Paul
Nov 19 '13 at 15:19
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In pure functional languages, is there an algorithm to get the inverse function?
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In some cases, yes! There's a beautiful paper called Bidirectionalization for Free! which discusses a few cases -- when your function is sufficiently polymorphic -- where it is possible, completely automatically to derive an inverse function. (It also discusses what makes the pr...