JavaScript: Map.prototype.get

By Xah Lee. Date: . Last updated: .

New in JS2015.

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
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