Lodash _.binary() Method

The Lodash _.binary() method returns a new function that accepts only two arguments and passes these arguments to the given function. Additional arguments are discarded.

Syntax:

_.binary( fun )

Parameters: This method takes a single parameter as listed above and discussed below.

• fun: This is the given function.

Return Value: It returns a new function.

Note: To execute the below examples, you have to install the lodash-contrib library by using this command prompt and execute the following command.

npm install lodash-contrib

Example 1: 

Javascript

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

// Function
function fun(){
    var mul = 1;
     for (var i = 0; i < arguments.length; i++) {
         mul = mul * arguments[i];
     }
     return mul;
}

var gfgFunc = _.binary(fun);

console.log("Multiplication is :", gfgFunc(2,23));

Output:

Multiplication is : 46

Example 2:

Javascript

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

// Function
function fun(){
    var mul = 1;
     for (var i = 0; i < arguments.length; i++) {
         mul = mul * arguments[i];
     }
     return mul;
}

var gfgFunc = _.binary(fun);

// Only operates for first two parameters
console.log("Multiplication is :", gfgFunc(2,23,10));

Output: 

Multiplication is : 46

Example 3:

Javascript

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

// Function
function fun(){
    return arguments;
}

var gfgFunc = _.binary(fun);

// Only operates for first two parameters
console.log("Arguments are :",
    gfgFunc('arg1', 'arg2', 'arg3', 'arg4'));

Output: Extra arguments are discarded.

Arguments are : [Arguments] { '0': 'arg1', '1': 'arg2' }