Zero appears from digit when duplicates removed using new Set

Asked Apr 26 '23 at 05:08

Active Apr 26 '23 at 05:09

Viewed 16 times

I want to remove duplicate digits from n. So what I expect is 123456789. But when I do so using new Set() below, I get 1234567890 with zero as the last digit. But there is no 0 in the original n.

Can you explain this?

let n=112233445566778899;
console.log([...new Set(String(n).split(''))].join(''));

edited Apr 26 '23 at 05:09

asked Apr 26 '23 at 05:08

Logan Lee

Try logging `String(n)` first. It's not what you expect – Phil Apr 26 '23 at 05:09
@Phil yeah String(n) gives 112233445566778900. Why is this? – Logan Lee Apr 26 '23 at 05:11
Where does `n` actually come from? If you're declaring it, why not simply define it as a string? – Phil Apr 26 '23 at 05:13
@Phil it's from a problem on the web and it's given as number in a function definition. – Logan Lee Apr 26 '23 at 05:14
Do you have a link? It's not a value that can be represented in JavaScript as a `Number`. If you copied it from the original, are you sure it wasn't a string or a `BigInt` literal, eg `let n = 112233445566778899n` – Phil Apr 26 '23 at 05:16
@Phil https://edabit.com/challenge/NXTrfGBXTKg3Z9jkz – Logan Lee Apr 26 '23 at 05:17
I see you didn't read the comments. It's just a badly worded test – Phil Apr 26 '23 at 05:19
Just passed the arg as bigint in the solution: https://jseditor.io/?key=pandigital-numbers – Logan Lee Apr 26 '23 at 05:28

Zero appears from digit when duplicates removed using new Set

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