js range

Array.apply( null, { length: 6 } ).map( Function.call, Number );

// es6
Array.from( new Array( 6 ), ( v, i ) => i ); // [ 0, 1, 2, 3, 4, 5 ]
Array.from( new Array( 6 ), ( v, i ) => ++i ); // [ 1, 2, 3, 4, 5, 6 ]

Array.from( Array( 6 ).keys( ) )