code: function _curry1(fn) {
  	  return function f1(a) {
  	    if (arguments.length === 0 || _isPlaceholder(a)) {
  	      return f1;
  	    } else {
  	      return fn.apply(this, arguments);
  	    }
  	  };
  	}
docs: Optimized internal one-arity curry function.
  
  @private
  @category Function
  @param {Function} fn The function to curry.
  @return {Function} The curried function.