function papply( fcn ) {
	var pargs;
	var i;
	if ( !isFunction( fcn ) ) {
		throw new TypeError( format( 'invalid argument. First argument must be a function. Value: `%s`.', fcn ) );
	}
	pargs = new Array( arguments.length-1 );
	for ( i = 1; i < arguments.length; i++ ) {
		pargs[ i-1 ] = arguments[ i ];
	}
	return papplied;

	/**
	* Partially applied function.
	*
	* @private
	* @param {...*} [args] - function arguments
	* @returns {*} partially applied function result
	*/
	function papplied() {
		var args;
		var j;
		args = pargs.slice();
		for ( j = 0; j < arguments.length; j++ ) {
			args.push( arguments[ j ] );
		}
		return fcn.apply( null, args );
	}
}
Returns a function of smaller arity by partially applying arguments.

@param {Function} fcn - function to partially apply
@param {...*} [args] - arguments to partially apply
@throws {TypeError} first argument must be a function
@returns {Function} partially applied function

@example
function add( x, y ) {
    return x + y;
}

var add2 = papply( add, 2 );

var sum = add2( 3 );
// returns 5