Lodash _.flatMap() Method
Lodash _.flatMap() method creates a flattened array of values by running each element in the collection through iteratee and flattening the mapped results.
Syntax:
_.flatMap(collection, iteratee);
Parameters:
- collection: This parameter holds the collection to iterate over.
- iteratee: This parameter holds the function invoked per iteration.
Return Value:
This method returns the new flattened array.
Example 1: In this example, we are passing a duplicate function to the lodash _.flatMap() method and an array and getting the result in the console.
javascript
// Requiring the lodash library const _ = require( "lodash" ); // Original array let user1 = ([35, 47, 58, 69, 94, 13, 72]); // Use of _.flatMap() method let gfg1 = _.flatMap(user1, function duplicate(n) { return [n, n]; }) // Printing the output console.log(gfg1); |
Output:
[
35, 35, 47, 47, 58, 58,
69, 69, 94, 94, 13, 13,
72, 72
]
Example 2: In this example, we are passing a duplicate function to the lodash _.flatMap() method and an array and getting the result in the console.
javascript
// Requiring the lodash library const _ = require( "lodash" ); // Original array let user1 = ([3.5, 4.7, 5.8, 6.9, 9.4, 1.3, 7.2]); let user2 = ([3, 4, 5, 9, 9, 1, 7]); // Use of _.flatMap() method let gfg1 = _.flatMap(user1, function duplicate(n) { return [n, n]; }) let gfg2 = _.flatMap(user2, function duplicate(n) { return [n, n]; }) // Printing the output console.log(gfg1); console.log(gfg2); |
Output:
[
3.5, 3.5, 4.7, 4.7, 5.8, 5.8,
6.9, 6.9, 9.4, 9.4, 1.3, 1.3,
7.2, 7.2
]
[
3, 3, 4, 4, 5, 5,
9, 9, 9, 9, 1, 1,
7, 7
]
Note: This code will not work in normal JavaScript because it requires the library lodash to be installed.