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JavaScript - set of objects
1 answers
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I'd like to have a set of objects that contains only unique objects. However, in my case I also need the keys to be objects.
I've read that Javascript casts property names to strings, so I guess I can't use set[object] = true.
Any ideas?
1 answer
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Since ES6 you can use native Set object type.
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let mySet = new Set();2
let a = {};3
let b = {};4
5
mySet.add(a);6
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console.log(mySet.has(a)); // true8
console.log(mySet.has(b)); // falseNote that a and b may have the same value but they are not the same objects in the operating memory (they have different references):
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let mySet = new Set();2
let a = { id: 1 };3
let b = { id: 1 };4
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mySet.add(a);6
mySet.add(b);7
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for (const item of mySet) {9
console.log(JSON.stringify(item));10
}
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