大约有 36,010 项符合查询结果（耗时：0.0393秒） [XML]
filtering NSArray into a new NSArray in Objective-C
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What does contains[c] mean? I always see the [c] but I don't understand what it does?
– user1007522
Jun 20 '14 at 14:41
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Union of dict objects in Python [duplicate]
How do you calculate the union of two dict objects in Python, where a (key, value) pair is present in the result iff key is in either dict (unless there are duplicates)?
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How do I pass values to the constructor on my wcf service?
...:
public class MyServiceHostFactory : ServiceHostFactory
{
private readonly IDependency dep;
public MyServiceHostFactory()
{
this.dep = new MyClass();
}
protected override ServiceHost CreateServiceHost(Type serviceType,
Uri[] baseAddresses)
{
return...
How to print out a variable in makefile
... painful detail:
It expands $(info $$var is [${var}])echo Hello world
To do this it first expands $(info $$var is [${var}])
$$ becomes literal $
${var} becomes :-) (say)
The side effect is that $var is [:-)] appears on standard out
The expansion of the $(info...) though is empty
Make is left wi...
In .NET, which loop runs faster, 'for' or 'foreach'?
...er
than looping on List using foreach
(which I believe, is what we all do).
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Sibling package imports
...ried reading through questions about sibling imports and even the
package documentation , but I've yet to find an answer.
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Is it possible to “await yield return DoSomethingAsync()”
...s into a simple one-liner. What happens is that each individual url begins downloading and then WhenAll is used combine those operations into a single Task which can be awaited.
Task<IEnumerable<string>> DownLoadAllUrls(string[] urls)
{
return Task.WhenAll(from url in urls select Do...
File Upload using AngularJS
...our controller define 'add' method:
$scope.add = function() {
var f = document.getElementById('file').files[0],
r = new FileReader();
r.onloadend = function(e) {
var data = e.target.result;
//send your binary data via $http or $resource or do anything else with it
}...
Why doesn't C have unsigned floats?
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Why C++ doesn't have support for unsigned floats is because there is no equivalent machine code operations for the CPU to execute. So it would be very inefficient to support it.
If C++ did support it, then you would be sometimes ...
Activate a virtualenv via fabric as deploy user
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Right now, you can do what I do, which is kludgy but works perfectly well* (this usage assumes you're using virtualenvwrapper -- which you should be -- but you can easily substitute in the rather longer 'source' call you mentioned, if not):
de...