What happened to Lodash _.pluck?

Question

I once used Lodash _.pluck ...I loved pluck...

Realizing Lodash no longer supports pluck (as of Lodash 4.x), I'm struggling to remember what to use instead...

I went to the docs , hit cmd-f, typed 'pluck', but my poor abandoned friend is not even given a proper mention...not even a 'has been replaced by'...

Can someone please remind me what I'm supposed to use instead?

Answer 1

Ah-ha! The Lodash Changelog says it all...

"Removed _.pluck in favor of _.map with iteratee shorthand"

var objects = [{ 'a': 1 }, { 'a': 2 }];

// in 3.10.1
_.pluck(objects, 'a'); // → [1, 2]
_.map(objects, 'a'); // → [1, 2]

// in 4.0.0
_.map(objects, 'a'); // → [1, 2]

Answer 2

There isn't a need for _.map or _.pluck since ES6 has taken off.

Here's an alternative using ES6 JavaScript:

clips.map(clip => clip.id)

Answer 3

Use _.map instead of _.pluck . In the latest version the _.pluck has been removed.

Answer 4

If you really want _.pluck support back, you can use a mixin:

const _ = require("lodash")

_.mixin({
    pluck: _.map
})

Because map now supports a string (the "iterator") as an argument instead of a function.

Answer 5

For plucking single or multiple properties:

_.mixin({
    properties: (paths) =>
            (obj) => paths.reduce((memo, path) => [...memo, obj[path]], []),
    pluck: (obj, ...keys) => _.map(obj, _.flatten(keys).length > 1
                                    ? _.properties(_.flatten(keys))
                                    : (o) => o[keys[0]])
})

var stooges = [{name: 'moe', age: 40}, {name: 'larry', age: 50}, {name: 'curly', age: 60}];

// underscore compatible usage
_.pluck(stooges, 'name');
=> ["moe", "larry", "curly"]

// multiple property usage
_.pluck(stooges, 'name', 'age')
=> [["moe",40], ["larry",50], ["curly",60]]

// alternate usage
_.pluck(stooges, ['name', 'age']) 
=> [["moe",40], ["larry",50], ["curly",60]]

Answer 6

Or try pure ES6 nonlodash method like this

const reducer = (array, object) => {
  array.push(object.a)
  return array
}

var objects = [{ 'a': 1 }, { 'a': 2 }];
objects.reduce(reducer, [])