lib/abaaso.js
function ( obj, arg ) {
		var result = -1;

		array.each( obj, function ( i, idx ) {
			if ( i === arg ) {
				result = idx;
			}
		});

		return result;
	}
function ( obj, arg ) {
		var result = -1;

		array.each( obj, function ( i, idx ) {
			if ( i === arg ) {
				result = idx;
			}
		});

		return result;
	}
function ( obj , arg ) { var result = - 1 ; array . each ( obj , function ( i , idx ) { if ( i === arg ) { result = idx ; } } ) ; return result ; }
Finds the last index of `arg` in `obj`

@method rindex
@param  {Array} obj Array to search
@param  {Mixed} arg Primitive to find
@return {Mixed}     Index or undefined
Finds the last index of arg in obj