Lodash _.forEach() Method

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

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// Requiring the lodash library  
const _ = require("lodash");  
  
// Use of _.forEach() method 
_.forEach(['c', 'cpp', 'java','python'], function(value) {
  console.log(value);
});

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Output:

'c'
'cpp'
'java'
'python'
['c', 'cpp', 'java','python']

Example 2:  

Javascript

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// Requiring the lodash library  
const _ = require("lodash");  
  
// Use of _.forEach() method 
_.forEach({ 'x': 1, 'y': 2 }, function(value, key) {
  console.log(key);
});

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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

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