Removing commas from javascript array

Question

I have 3 strings "a","b","c" in javascript array "testarray".

var testarray=new Array("a","b","c");

and then I am printing the value of testarray using javascript alert box.

alert(testarray);

The result will be like a,b,c

All these strings are separated by "," character. I want to replace this "," with some other character or combination of two or more characters so that the alert box will show something like a%b%c or a%$b%$c

Answer 1

Use the join method:

alert(testarray.join("%")); // 'a%b%c'

Here's a working example. Note that by passing the empty string to join you can get the concatenation of all elements of the array:

alert(testarray.join("")); // 'abc'

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Side note: it's generally considered better practice to use an array literal instead of the Array constructor when creating an array:

var testarray = ["a", "b", "c"];