This post is part of a series called Guess the JavaScript Output
And today's question is a bit tricky one:
What will be the output of the following code?
let a = {};
let b = { key: "b" };
let c = { key: "c" };
a[b] = 123;
a[c] = 456;
console.log(a[b]);
Uncle Mike solved this within 20s (Mike started coding in the womb and has built his own OS called MikeOS).
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Top comments (6)
Guess the object should be casted to something. The values of
bandcshould result in the same value. So would guess456as the element gets overwritten.a[c]should give456too.456
123
456
456
I won't write why as it makes it too easy for everyone else :)