Array.Join method

Explanation	Returns each element of the Array as a string separated by separators.
Call format	var data = arr.join( separator )
Return value	Returns a string that combines the elements of an Array.
Argument	String separator	Separator character that joins elements
Exception	None
Example of use	`var arr = new Array; arr[0] = "test1"; arr[1] = "test2"; arr[2] = "test3"; print(arr.Join("-"), "\n");`
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