Published Mar 19, 2022
[
_.map(collection, [iteratee=_.identity])
Creates an array of values by running each element in collection thru
iteratee. The iteratee is invoked with three arguments:
(value, index|key, collection).
collection (Array|Object): The collection to iterate over.
[iteratee=_.identity] (Function): The function invoked per iteration.
(Array): Returns the new mapped array.
function square(n) {
return n * n;
}
_.map([4, 8], square);
// => [16, 64]
_.map({ 'a': 4, 'b': 8 }, square);
// => [16, 64] (iteration order is not guaranteed)
var users = [
{ 'user': 'barney' },
{ 'user': 'fred' }
];
// The `_.property` iteratee shorthand.
_.map(users, 'user');
// => ['barney', 'fred']