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

JS Map

  1. the Map Object Tutorial
  2. Iterate Over Map Object
  3. Convert Object to/from Map
  4. Map Filter
  5. Reverse Key/Value

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