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complement javascript Code Snippet in 2022

functionlogicbeginner

Last Updated: 26 November 2022

Returns a function that is the logical complement of the given function, fn.

  • Use the logical not (!) operator on the result of calling fn with any supplied args.
const complement = fn => (...args) => !fn(...args);
const isEven = num => num % 2 === 0; const isOdd = complement(isEven); isOdd(2); // false isOdd(3); // true

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