Pluck Func in JavaScript with .reduce()

Implement a simple pluck using Array.prototype.reduce.

const pluck = (list, key) =>
  list.reduce((pV, cV) => (key in cV ? [...pV, cV[key]] : [...pV]), []);

Usage

Provide an array (list) of objects and a property name (key) to pluck, and the function will return a list of all values found in list[n*][key].

// Sample data
const movies = [
  {
    title: "Invasion of the Body Snatchers",
    releaseDate: 1978,
    mpar: "R",
    rating: 5,
    comments: "This is my favorite!",
  },
  {
    title: "Invasion of the Body Snatchers",
    releaseDate: 1956,
    comments:
      "This a good film, but doesn't have Jeff Goldblum, Leonard Nimoy, or even Donald Sutherland in it.",
  },
  {
    title: "The Invasion",
    releaseDate: 2007,
    rating: 3,
    comments: "Not my favorite, but it was watchable.",
  },
  {
    title: "Attack the Block",
    releaseDate: 2010,
    rating: 4.5,
    comments: "A fun movie, innit.",
  },
  {
    title: "Ubik",
    comments: "It's just as well; they probably would have ruined it anyway.",
    mpar: null,
  },
];

Pluck all title values from movies...

console.log(pluck(movies, "title"));

[
  'Invasion of the Body Snatchers',
  'Invasion of the Body Snatchers',
  'The Invasion',
  'Attack the Block',
  'Ubik'
]

Pluck all mpar (Motion Picture Association ratings) from movies.

console.log(pluck(movies, "mpar"));

[ 'R', null ]

Note that pluck() is not fooled by falsie values because (key in cV) explicitly checks for the key and returns whatever value it's pointed at–even if the value is undefined! I think this is what you want from pluck() to keep it generic. You could clean out any unwanted values like undefined or false on a second pass or extend this to accept a filtering callback after the (key in cV), but I'm stupid, so I'm keeping it simple.