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Lodash - flatMap method
Syntax
_.flatMap(collection, [iteratee=_.identity])
Creates a flattened array of values by running each element in collection thru iteratee and flattening the mapped results. The iteratee is invoked with three arguments: (value, index|key, collection).
Arguments
collection (Array|Object) − The collection to iterate over.
[iteratee=_.identity] (Function) − The function invoked per iteration.
Output
(Array) − Returns the new flattened array.
Example
var _ = require('lodash'); var list = [1 , 2, 3, 4, 5]; var result = _.flatMap(list, function(n) { return [n, n]; }); 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 ]
lodash_collection.htm
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