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How to check 'undefined' value in jQuery
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JQuery library was developed specifically to simplify and to unify certain JavaScript functionality.
However if you need to check a variable against undefined value, there is no need to invent any special method, since JavaScript has a typeof operator, which is simple, fast and...
Android - Set fragment id
...nsaction's add(int containerViewId, Fragment fragment, String tag) method and FragmentManager's findFragmentByTag(String) method.
In one of my apps, I was forced to generate strings dynamically. But it's not that expensive relative to the actual FragmentTransaction, anyway.
Another advantage to ...
Is is possible to check if an object is already attached to a data context in Entity Framework?
...eing attached. Calling CreateEntityKey on the context makes sure it's nice and generic and will work even with composite keys with no further coding (because EF can already do that for us!).
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Sample random rows in dataframe
...propriate function that would return a specified number of rows picked up randomly without replacement from a data frame in R language? Can anyone help me out?
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“Add as Link” for folders in Visual Studio projects
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+1. You could also use <Content ...>, and add <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory> to make Visual Studio copy the resources on build.
– Markus Jarderot
May 18 '12 at 18:12
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How to rethrow InnerException without losing stack trace in C#?
...s now the ExceptionDispatchInfo class.
This lets you capture an exception and re-throw it without changing the stack-trace:
try
{
task.Wait();
}
catch(AggregateException ex)
{
ExceptionDispatchInfo.Capture(ex.InnerException).Throw();
}
This works on any exception, not just AggregateExcep...
Check if instance is of a type
... A small note: use "is" if you don't want to use the result of the cast and use "as" if you do.
– Aviram Fireberger
Nov 10 '15 at 14:55
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How to hide Bootstrap modal with javascript?
I've read the posts here, the Bootstrap site, and Googled like mad - but can't find what I'm sure is an easy answer...
24 A...
Bootstrap modal: background jumps to top on toggle
...e the css for .modal-open class. But, what if there is extra closing divs, and in my answer, I have not override any classes in my resolution? It works fine after removing 2 extra divs. bs modal adding .modal-backdrop div which will get confused where it needed to be closed because of extra closing ...
Selectors in Objective-C?
First, I'm not sure I really understand what a selector is. From my understanding, it's the name of a method, and you can assign it to a class of type 'SEL' and then run methods such as respondToSelector to see if the receiver implements that method. Can someone offer up a better explanation?
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