code: function ( i, r ) {
  		if ( r === true ) {
  			return i > 1 ? utility.fib( i - 1, r ) + utility.fib( i - 2, r ) : i;
  		}
  		else {
  			return array.last( array.fib( i ) );
  		}
  	}
docs: Fibonacci calculator
  
  @method fib
  @param  {Number}  i Number to calculate
  @param  {Boolean} r Recursive if `true`
  @return {Number}    Calculated number