Lodash _.invokeMap() Method

Lodash is a JavaScript library that works on the top of underscore.js. Lodash helps in working with arrays, collection, strings, objects, numbers etc.

The _.invokeMap() method invokes the method at the given path of each element in the collection and returns an array of the results of each invoked method. Additional arguments can be provided to each invoked method using the args parameter. The given path can also be a function that would be bound to each element in the collection.

Syntax:

_.invokeMap( collection, path, args )

Parameters: This method accepts three parameters as mentioned above and described below:

• collection: This parameter holds the collection that has to be iterated over.
• path: This parameter holds the path of the method to invoke or the function invoked per iteration.
• args: This parameter holds the arguments to invoke each method with.

Return Value: This method returns the array of results.

Example 1:

// Requiring the lodash library
const _ = require("lodash");

// Original array
let obj = [[6, 2, 8], [2, 1, 0]];

// Using the _.invokeMap() method
let gfg1 = _.invokeMap(obj, 'sort');

// Printing the output
console.log(gfg1);

Output:

[ [ 2, 6, 8], [ 0, 1, 2 ] ]

Example 2:

// Requiring the lodash library
const _ = require("lodash");

// Original array
let obj = [628, 210];

// Using the _.invokeMap() method
let gfg1 = _.invokeMap(obj, String.prototype.split, '');

// Printing the output
console.log(gfg1);

Output:

[ [ '6', '2', '8'], [ '2', '1', '0' ] ]

Example 3:

// Requiring the lodash library
const _ = require("lodash");

// Original array
let obj = ['srqp', 'tuvw'];
let obj1 = [ ['c', 'b', 'a'], ['f', 'e', 'd'] ];

// Using the _.invokeMap() method
let gfg = _.invokeMap(obj, String.prototype.split, '');
let gfg1 = _.invokeMap(obj1, 'sort');

// Printing the output
console.log(gfg, gfg1);

Output:

[ [ 's', 'r', 'q', 'p'], [ 't', 'u', 'v', 'w' ] ]
[ [ 'a', 'b', 'c'], [ 'd', 'e', 'f' ] ]