code: function partialWithArityOfOne(fn) {
  		var args = arguments;
  
  		return function(a) {
  			return partial.apply(this, args).apply(this, arguments);
  		};
  	}
docs: Partially apply a function, but ensure the returned function has an arity of one.
  @param  {Function} fn      The function to partially apply.
  @return {Function}         The partially applied function.