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BasicJavaScript~8 min

Find the second largest number

Classic question in almost every QA coding round

Points available

100/100

Your mission

  1. Read
  2. 2Run
  3. 3Submit
  4. 4Solve

Write secondLargest(nums) that returns the second largest distinct number.

Return null if it does not exist. Do not sort the array.

Examples

secondLargest([10, 5, 20, 8]) → 10
secondLargest([7, 7]) → null

Hints

Each hint costs 10 points on a full solve.

Interviewer follow-ups

  • What happens with negative numbers?
  • Generalise to the k-th largest.

Ctrl+Enter to run · add Shift to submit

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Tab inserts two spaces. Press Escape, then Tab, to leave the editor.
Terminal

$ node solution.js

Run executes the open file. Submit scores solution.js against hidden tests.

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