Simple encode/decode for Array of Numbers (6-bit)

gistfile1.js

function decode( string ) {

	var output = [];
	string.split('').forEach( function ( v ) { output.push( "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/".indexOf( v ) ); } );
	return output;

}

function encode( array ) {

	var output = "";
	array.forEach( function ( v ) { output += "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/".charAt( v ); } );
	return output;

}

var data = [20, 20, 20, 0, 18, 18, 10, 2, 15, 30, 10, 5, 20, 20, 20, 1, 18, 18, 10, 2, 15, 30, 10, 10];
var encoded = encode( data );
var decoded = decode( encoded ); 

console.log( data );
console.log( encoded );
console.log( decoded );