Last Updated : 03 Sep, 2024
Lodash's _.flatMapDepth() method flattens an array by applying a function to each element and recursively flattening the results up to a specified depth. It's similar to _.flatMap() but allows control over the flattening depth.
Syntax:
_.flatMapDepth( collection, iteratee, depth )
Parameters:
This method accepts three parameters as mentioned above and described below:
Return Value: This method returns the new flattened array.
Example 1: In this example we use Lodash's _.flatMapDepth() to duplicate each element in the users array, then recursively flatten the result to a depth of 2
javascript
// Requiring the lodash library
const _ = require("lodash");
// Original array
let users = ([3, 4]);
// Using the _.flatMapDepth() method
let flat_map = _.flatMapDepth(users, duplicate, 2)
function duplicate(n) {
return [[[n, n]]];
}
// Printing the output
console.log(flat_map);
Output:
[ [ 3, 3 ], [ 4, 4 ] ]
Example 2: In this example we use Lodash's _.flatMapDepth() to duplicate each string in the users array, recursively flattening the nested arrays to a depth of 2
javascript
// Requiring the lodash library
const _ = require("lodash");
// Original array
let users = (['q', 'r', 't', 'u']);
// Using the _.flatMapDepth() method
let flat_map = _.flatMapDepth(users, duplicate, 2)
function duplicate(n) {
return [[[n, n]]];
}
// Printing the output
console.log(flat_map);
Output:
[ [ 'q', 'q' ], [ 'r', 'r' ], [ 't', 't' ], ['u', 'u' ] ]
RetroSearch is an open source project built by @garambo | Open a GitHub Issue
Search and Browse the WWW like it's 1997 | Search results from DuckDuckGo
HTML:
3.2
| Encoding:
UTF-8
| Version:
0.7.4