Lodash _.binary() Method

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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' }

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