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sebdeckers/map.js

Last active November 25, 2015 02:19
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Map
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map.js
class Person {
constructor (name, score) {
this.name = name
this.score = score
}
}
const alice_foo = new Person('Alice', 10)
const alice_bar = new Person('Alice', 50)
const people_object = {}
people_object[alice_foo.name] = alice_foo.score
people_object[alice_bar.name] = alice_bar.score
console.log(people_object[alice_foo.name] === alice_bar.score) // Oops! true
const people_map = new Map()
people_map.set(alice_foo, alice_foo.score)
people_map.set(alice_bar, alice_bar.score)
console.log(people_map.get(alice_foo) === alice_foo.score) // Correct! true
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