Lodash _.quaternary() Method
The Lodash _.quaternary() returns a new function that accepts only four arguments and passes these arguments to the given function. Additional arguments are discarded.
Syntax:
_.quaternary( fun )
Parameters: This method takes a single parameter as listed above and discussed below.
- fun: This is the given function.
Return Value: This method 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(){ return arguments; } // Making quaternary function var gfgFunc = _.quaternary(fun); console.log("Arguments are :", gfgFunc( "first", "second", "third", "fourth")); |
Output:
Arguments are : [Arguments] {
'0': 'first',
'1': 'second',
'2': 'third',
'3': 'fourth'
}
Example 2:
Javascript
// Defining lodash contrib variable var _ = require('lodash-contrib'); // Function function fun(){ return arguments; } // Making quaternary function var gfgFunc = _.quaternary(fun); // Rest arguments are excluded console.log("Arguments are :", gfgFunc( "a", "b", "c", "d", "e", "f")); |
Output:
Arguments are : [Arguments]
{ '0': 'a', '1': 'b', '2': 'c', '3': 'd' }
Example 3: In this example, we will add arguments but only the first 4 arguments will be using this method.
Javascript
// Defining lodash contrib variable var _ = require('lodash-contrib'); // Function function add(){ s = 0 for(i = 0; i < 4; i++){ s += arguments[i] } return s; } // Making quaternary function var gfgFunc = _.quaternary(add); // Rest arguments are excluded console.log("Sum of first 4 arguments is :", gfgFunc(100, 100, 100, 100, 100)); |
Output:
Sum of first 4 arguments is : 400
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