JS: Map.prototype.get

By Xah Lee. Date: . Last updated: .

New in ES2015.

map_obj.get(key)

Return the value of the key key in map map_obj.

If key isn't found, return undefined.

const m = new Map([ [4, "n4"], [5, "n5"] ]);

// get the value of a key
console.log(m.get (5)); // "n5"

console.log(m.get (99)); // undefined

Reference

ECMAScript 2015 §Keyed Collection#sec-map.prototype.get

Map Topic

  1. JS: the Map Object Tutorial
  2. JS: Map Object
  3. JS: Map.prototype
  4. JS: Iterate Over Map Object
  5. JS: Convert Object to/from Map
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