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Question #47

Author: admin

tags: JavaScript

'use strict';

const obj = {
  0x1: 100,
  '0x1': 200,
  '1': 300,
  1: 400,
}

console.log(Object.keys(obj).length); // ??

How many properties are there in an object? What will the console output?

Hint: 0x1 is a hexadecimal notation of the decimal number 1.

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