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Returns the keys of the array. Keys are not sorted and index in the returned array does not correspond to index in the original array. The routine function only returns a list of added keys. If the array contains no keys an empty array is returned.

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String []

Example

number []arr;
arr["one"] = 1;
arr["two"] = 2;
arr["three"] = 3;
arr[3] = 4;

string [] arrkeys = arrayKeys(arr); // contains strings 'one', 'two', 'three' but not necessary in that order !

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