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I'm writing an application in Flex / ActionScript and have a number of class member variables of type Array storing data.
My question is: what's the "best" way to clear out an Array object?
I noticed the ArrayCollection class has a function removeAll() which does this, but the basic Array class does not. Some possibilities I've considered are:
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Java arrays do not provide a direct remove method to remove an element. In fact, we have already discussed that arrays in Java are static so the size of the arrays cannot change once they are instantiated. Thus we cannot delete an element and reduce the array size.
Array elements can be deleted using the JavaScript operator delete . Using delete leaves undefined holes in the array. Use pop() or shift() instead.
We know that arrays in C# have fixed size, and we cannot simply remove an element from it. However, we can create a new array containing the desired elements from the original arrays.
I'd say:
myArray = [ ];
That's explicit, short, and makes good use of the VM's garbage collector.
Your first alternative runs a lot of interpreted code to get the same result.
I don't know that the second does what you want; if it does, it's hacky, unclear.
The "new Array()" variant of the third alternative is just wordy, offering no advantage over an array literal. If you also write JS and use JSLint, you'll get yelled at for not using the array literal form.
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