javascriptOtherMedium

Every team ends up with every player

Time: 0:00

BugFind the bug and fix the code

What it should do

splitTeams(players) puts each player in team 0 or team 1. Example: splitTeams([{ name: "a", team: 0 }, { name: "b", team: 1 }]) → [["a"], ["b"]].

What happens instead

splitTeams([{ name: "a", team: 0 }, { name: "b", team: 1 }]) returns [["a", "b"], ["a", "b"]].

function splitTeams(players) {
  const teams = Array(2).fill([]);
  for (const p of players) {
    teams[p.team].push(p.name);
  }
  return teams;
}

Test a custom input to verify an edge case (e.g. empty lists, negative numbers, duplicates).

⏱️0:00

Hints

🏆 0 hints = Flawless Solve

Hint 2

Unlocks after Hint 1

Hint 3

Unlocks after Hint 2

This bug belongs to the mutation and copying bugs pattern

Assignment does not copy, a shallow copy still shares its contents, and mutating methods return None.

Learn the mutation and copying bugs pattern Step through your own code

<iframe src="https://trybughunt.com/embed/ee2af17d-8e08-446a-aa72-6b6e33901d5d" title="Debugging challenge: Every team ends up with every player" width="100%" height="580" loading="lazy" style="border:1px solid #d4d4d8;border-radius:12px;max-width:760px"></iframe> <p style="font-size:14px">Debugging challenge from <a href="https://trybughunt.com/challenges/ee2af17d-8e08-446a-aa72-6b6e33901d5d">TryBugHunt</a></p>

javascriptOtherMedium

Every team ends up with every player

Time: 0:00

BugFind the bug and fix the code

What it should do

splitTeams(players) puts each player in team 0 or team 1. Example: splitTeams([{ name: "a", team: 0 }, { name: "b", team: 1 }]) → [["a"], ["b"]].

What happens instead

splitTeams([{ name: "a", team: 0 }, { name: "b", team: 1 }]) returns [["a", "b"], ["a", "b"]].

function splitTeams(players) {
  const teams = Array(2).fill([]);
  for (const p of players) {
    teams[p.team].push(p.name);
  }
  return teams;
}

Test a custom input to verify an edge case (e.g. empty lists, negative numbers, duplicates).

⏱️0:00

Hints

🏆 0 hints = Flawless Solve

Hint 2

Unlocks after Hint 1

Hint 3

Unlocks after Hint 2

This bug belongs to the mutation and copying bugs pattern

Assignment does not copy, a shallow copy still shares its contents, and mutating methods return None.

Learn the mutation and copying bugs pattern Step through your own code

Every team ends up with every player

What it should do

What happens instead

More mutation and copying bugs to practise

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Every team ends up with every player

What it should do

What happens instead

More mutation and copying bugs to practise

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