The _.forEach() method iterates over elements of collection and invokes iteratee for each element.
Syntax:
_.forEach( collection, [iteratee = _.identity] )
Parameters: This method accepts two parameters as mentioned above and described below:
- collection: This parameter holds the collection to iterate over.
- iteratee: It is the function that is invoked per iteration.
Return Value: This method returns the collection.
Note: Here, const _ = require(‘lodash’) is used to import the lodash library into the file.
Example 1:
Javascript
// Requiring the lodash library const _ = require("lodash"); // Use of _.forEach() method _.forEach(['c', 'cpp', 'java','python'], function(value) { console.log(value); }); |
Output:
'c' 'cpp' 'java' 'python' ['c', 'cpp', 'java','python']
Example 2:
Javascript
// Requiring the lodash library const _ = require("lodash"); // Use of _.forEach() method _.forEach({ 'x': 1, 'y': 2 }, function(value, key) { console.log(key); }); |
Output:
'x'
'y'
{ 'x': 1, 'y': 2 }
Note: This will not work in normal JavaScript because it requires the library lodash to be installed.
Reference: https://lodash.com/docs/4.17.15#forEach
