Lodash is a JavaScript library that works on the top of underscore.js. Lodash helps in working with arrays, strings, objects, numbers, etc.
The _.ternary() method returns a new function that accepts only three arguments and passes these arguments to the given function. Any additional arguments that are given are discarded.
Syntax:
_.ternary( fun )
Parameters: This method takes a single parameter as listed above and discussed below:
- fun: This is the function that should be used for the parameters.
Return Value: This method returns a new function.
Note: This method will not work in normal JavaScript because it requires the Lodash contrib library to be installed. The lodash-contrib library can be installed using npm install lodash-contrib –save
Example 1:
Javascript
// Defining lodash contrib variable var _ = require('lodash-contrib');Â Â Â // Function to be used function fun() { Â Â Â Â return arguments; } Â Â // Making the ternary function var gfgFunc = _.ternary(fun); Â Â console.log("Arguments are :", Â Â Â Â gfgFunc("first", "second", "third")); |
Output:
Arguments are : [Arguments]
{ '0': 'first', '1': 'second', '2': 'third' }
Example 2:
Javascript
// Defining lodash contrib variable var _ = require('lodash-contrib');Â Â Â // Function to be used function fun() { Â Â Â Â return arguments; } Â Â // Making the ternary function var gfgFunc = _.ternary(fun); Â Â // Arguments more than 3 are excluded console.log("Arguments are :", Â Â Â Â gfgFunc("a", "b", "c", "d", "e", "f")); |
Output:Â
Arguments are : [Arguments] { '0': 'a', '1': 'b', '2': 'c' }
Example 3: In this example, we will add arguments but only the first 3 arguments will be using this method.
Javascript
// Defining lodash contrib variable var _ = require('lodash-contrib');Â Â Â // Function to be used function add() { Â Â Â Â s = 0; Â Â Â Â for (i = 0; i < 3; i++) { Â Â Â Â Â Â Â Â s += arguments[i]; Â Â Â Â } Â Â Â Â return s; } Â Â // Making the ternary function var gfgFunc = _.ternary(add); Â Â // Arguments more than 3 are excluded console.log("Sum of first 3 arguments is :", Â Â Â Â gfgFunc(100, 100, 1000, 4, 5, 6, 7)); |
Output:Â
Sum of first 3 arguments is : 1200
