join

Summary

Adds all the elements of an array separated by the specified separator string.

Syntax

join([ separator ])

separator

Optional. A string used to separate one element of an array from the next in the resulting String. If omitted, the array elements are separated with a comma.

Examples

The following example illustrates the use of the join method.

var a, b;
 a = new Array(0,1,2,3,4);
 b = a.join( "-" ) ;
 document.write(b);

 // Output:
 // 0-1-2-3-4

Remarks

If any element of the array is undefined or null , it is treated as an empty string.

See also

Specification

15.4.4.5 Array.prototype.join (separator) ECMAScript® Language Specification Standard ECMA-262 5.1 Edition / June 2011

Attributions

• Microsoft Developer Network: Article