Max (golf)
Return the largest array element. The array is non-empty and contains finite numbers.
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Shortest code (golf)
Shortest code (golf) - solve it, but length counts. Fit within the character limit and beat the shortest-solution record. Trains conciseness and language tricks.
- Correctness
- Character limit
- Concise JavaScript
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Reverse string (Golf)
Reverse string with min chars. Reverse Unicode code points without splitting emoji surrogate pairs.
Preview challenge → Free account required to solveIs even (Golf)
For integer n, return a boolean: true if n is even, otherwise false. Zero and negative even integers also return true.
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Available challenges: 7.
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How should you approach these challenges?
JavaScript code golf practises concision: you seek a shorter expression while preserving the required behaviour. You explore alternative uses of operators and language methods. In application code, assess those shortcuts for readability as well as character count.
First write a solution that passes the tests, then shorten it. Change one fragment at a time and check the character limit. Type-coercion shortcuts can fail for zero, empty strings or empty arrays, so rerun every case after each optimisation.
Explore an example: Max (golf) →
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