Lodash _.cond() Method

0 0 1 minute read

Lodash is a JavaScript library that works on the top of underscore.js. Lodash helps in working with arrays, strings, objects, numbers, etc.
The _.cond method creates a function that iterates over pairs and invokes the corresponding function of the first predicate to return truthy. The predicate-function pairs are invoked with the binding and arguments of the created function.

Syntax:

_.cond(pairs)

Parameters: This method accepts one parameter as mentioned above and described below:

pairs: [Array]The predicate-function pairs.

Return Value: [Array]The predicate-function pairs.

Note : Here, const _ = require(‘lodash’) is used to import the lodash library in the file.

Example 1:

Javascript

// Requiring the lodash library   
const _ = require("lodash"); 
  
//  using _.cond() method 
var func1 = _.cond([ 
    [_.matches({ 'zambiatek': 1 }), 
        _.constant('Matches Geeks')], 
    [_.conforms({ 'for': _.isNumber }), 
        _.constant('Matches For')], 
    [_.stubTrue, _.constant('no match')] 
]); 
  
// Storing the Result 
gfg = func1({ 'zambiatek': 1, 'b': 2 }); 
  
// Printing the output   
console.log(gfg); 

Output:

"Matches Geeks"

Example 2:

Javascript

// Requiring the lodash library   
const _ = require("lodash"); 
  
//  using _.cond() method 
var func2 = _.cond([ 
    [_.matches({ 'zambiatek': 1 }),  
        _.constant('Matches Geeks')], 
    [_.conforms({ 'for': _.isNumber }),  
        _.constant('Matches For')], 
    [_.stubTrue, _.constant('No Match')] 
]); 
  
// Storing Result  
gfg1 = func2({ 'zambiatek': 0, 'for': 1 }); 
gfg2 = func2({ 'zambiatek': '1', 'for': '2' }); 
  
// Printing the output   
console.log(gfg1); 
console.log(gfg2) 

Output:

"Matches For"
"No Match"

Whether you’re preparing for your first job interview or aiming to upskill in this ever-evolving tech landscape, zambiatek Courses are your key to success. We provide top-quality content at affordable prices, all geared towards accelerating your growth in a time-bound manner. Join the millions we’ve already empowered, and we’re here to do the same for you. Don’t miss out – check it out now!