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Constructor function vs Factory functions
... function is used with the new keyword (which causes JavaScript to automatically create a new object, set this within the function to that object, and return the object):
var objFromConstructor = new ConstructorFunction();
A factory function is called like a "regular" function:
var objFromFactor...
What is the Swift equivalent of respondsToSelector?
...e what you need with the ? optional unwrapper operator. This allows you to call a method on an object if and only if the object exists (not nil) and the method is implemented.
In the case where you still need respondsToSelector:, it is still there as part of the NSObject protocol.
If you are calli...
Handling applicationDidBecomeActive - “How can a view controller respond to the app becoming Active?
...ationDidBecomeActiveNotification and specify which method that you want to call when that notification gets sent to your application.
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(someMethod:)
...
How to position text over an image in css
...
How about something like this: http://jsfiddle.net/EgLKV/3/
Its done by using position:absolute and z-index to place the text over the image.
#container {
height: 400px;
width: 400px;
position: relative;
}
#image {
position: absolute;
left: 0;...
warning this call is not awaited, execution of the current method continues
...stackoverflow.com/a/12145047/928483.
Exceptions thrown during an async call that is not awaited will be lost. To get rid of this warning, you should assign the Task return value of the async call to a variable. This ensures you have access to any exceptions thrown, which will be indicated in the...
How to call another controller Action From a controller in Mvc
I need to call a controller B action FileUploadMsgView from Controller A and need to pass a parameter for it.
10 Answers
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Using context in a fragment
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getActivity() can return null if it is called before onAttach of the respective fragment.
– arne.jans
Apr 29 '13 at 15:36
4
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What to gitignore from the .idea folder?
... to add and what to exclude from our Git repository. Clearly some files inside the .idea folder are meant to be version controlled like the external library settings ( jsLibraryMappings.xml ) but others will probably change very often and are developer-specific (e.g., workspace.xml ).
...
Calling pylab.savefig without display in ipython
...ction between IPython and matplotlib.pylab in this regard. But, when I call pylab.savefig("test.png") the current figure get's displayed in addition to being saved in test.png . When automating the creation of a large set of plot files, this is often undesirable. Or in the situation that an i...
Task not serializable: java.io.NotSerializableException when calling function outside closure only o
Getting strange behavior when calling function outside of a closure:
9 Answers
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