Underscore.js _.flip2() Method

The _.flip2() method returns a function that works identically to given function but accepts the first two arguments in reverse order. The order of all rest arguments remains the same.

Syntax:

_.flip2( function );

Parameters: This method takes a function that takes some arguments.

Return Value: This method returns a function.

Note: This will not work in normal JavaScript because it requires the underscore.js contrib library to be installed. 

underscore.js contrib library can be installed using npm install underscore-contrib –save.

Example 1:

Javascript

// Defining underscore contrib variable
var _ = require('underscore-contrib');

function gfgFunc(a, b, c) {
    return "Value of a is " +
    a + " and Value of b is " +
    b + " and Value of c is " + c;
}

var abc = _.flip2(gfgFunc);

console.log(abc(1, 2, 3));

Output:

Value of a is 2 and Value of b is 1 and Value of c is 3

Example 2: 

Javascript

// Defining underscore contrib variable
var _ = require('underscore-contrib');

function gfgFunc(a, b) {
    return b + " is " + a;
}

var gfg = _.flip2(gfgFunc);

console.log(gfg("GeeksforGeeks",+
   "Computer Science Portal for Geeks"));

Output:

GeeksforGeeks is Computer Science Portal for Geeks