Lodash - flatMapDepth method

Syntax

_.flatMapDepth(collection, [iteratee=_.identity], [depth=1])

This method is like _.flatMap except that it recursively flattens the mapped results up to depth times.

Arguments

• collection (Array|Object) − The collection to iterate over.

• [iteratee=_.identity] (Function) − The function invoked per iteration.

• [depth=1] (number) − The maximum recursion depth.

Output

• (Array) − Returns the new flattened array.

Example

var _ = require('lodash');
var list = [1 , 2, 3, 4, 5];
 
var result = _.flatMapDepth(list, function(n) {
   return [[[n, n]]];
},2);

console.log(result);

Save the above program in tester.js. Run the following command to execute this program.

Command

\>node tester.js

Output

[ [ 1, 1 ], [ 2, 2 ], [ 3, 3 ], [ 4, 4 ], [ 5, 5 ] ]