Daily Coding Problem: Problem #1415 [Easy]

Good morning! Here's your coding interview problem for today.

This problem was asked by Stripe.

Write a function to flatten a nested dictionary. Namespace the keys with a period.

For example, given the following dictionary:

{
    "key": 3,
    "foo": {
        "a": 5,
        "bar": {
            "baz": 8
        }
    }
}

it should become:

{
    "key": 3,
    "foo.a": 5,
    "foo.bar.baz": 8
}

You can assume keys do not contain dots in them, i.e. no clobbering will occur.

Upgrade to premium and get in-depth solutions to every problem, including this one. Since you were referred by one of our affiliates, you'll get a 10% discount on checkout!

If you liked this problem, feel free to forward it along so they can subscribe here! As always, shoot us an email if there's anything we can help with!

Practice makes perfect. Book a mock interview with a FAANG-level interviewer today from our friends at Exponent (10% off!).

System design interviews are becoming more popular in SWE interviews. Here's how to prepare.

No more? Snooze or unsubscribe.