Lodash Remove all but one property from list of objects

Question

Is there a lodash function that can produce the following:

Orignally:

var persons = [{"1":1, "2":2, "3":3}, {"1":12, "2":22, "3":32}];
var result = _.func(persons, "1")

After:

result = [{"1":1},{"1":12}]

Answer 1

Not as a single function.

You can combine _.map() to iterate through the array with _.pick() to reduce each object within it.

var result = _.map(persons, function (p) {
    return _.pick(p, '1');
});

You can also use _.partialRight() to create the iterator function:

var result = _.map(persons, _.partialRight(_.pick, '1'));

Answer 2

I think you're looking for lodash - pick .

var object = { 'a': 1, 'b': '2', 'c': 3 };
_.pick(object, ['a', 'c']); // → { 'a': 1, 'c': 3 }