Array to string?

Is it possible to turn an array into a string? I’m stuck on project.

For example:

contents is an array containing: ("~a","~b","~c")

var my_str:String = var contents:Array;
contents = my_str.split("~");
trace(contents);

I’m trying to delete the ~ that’s been inserted, (in another part of my code earlier)

The result should be:
(a,b,c)

how can I do this?