code: function prod( arr ) {
  	var len = arr.length,
  		p = 1,
  		i;
  	for ( i = 0; i < len; i++ ) {
  		if ( arr[ i ] === 0 ) {
  			return 0;
  		}
  		p *= arr[ i ];
  	}
  	return p;
  }
docs: FUNCTION: prod( arr )
  Computes an array product.
  
  @param {Number[]|Int8Array|Uint8Array|Uint8ClampedArray|Int16Array|Uint16Array|Int32Array|Uint32Array|Float32Array|Float64Array} arr - input array
  @returns {Number} product