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Possible Duplicate:
What is the usage of array of zero length?
What is the purpose of zero length arrays.Are they of any use or just like that because the syntax allows?
If you have a function that takes an array, and you want to give it an array with nothing in it, you pass an zero-length array.
If you read an array from an external source, and it happens to not have any items, you’ll get an zero-length array.