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either javascript Code Snippet in 2023

functionlogicbeginner

Last Updated: 28 January 2023

Checks if at least one function returns true for a given set of arguments.

  • Use the logical or (||) operator on the result of calling the two functions with the supplied args.
const either = (f, g) => (...args) => f(...args) || g(...args);
const isEven = num => num % 2 === 0; const isPositive = num => num > 0; const isPositiveOrEven = either(isPositive, isEven); isPositiveOrEven(4); // true isPositiveOrEven(3); // true

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