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compose javascript Code Snippet in 2022

functionintermediate

Last Updated: 26 November 2022

Performs right-to-left function composition.

  • Use Array.prototype.reduce() to perform right-to-left function composition.
  • The last (rightmost) function can accept one or more arguments; the remaining functions must be unary.
const compose = (...fns) => fns.reduce((f, g) => (...args) => f(g(...args)));
const add5 = x => x + 5; const multiply = (x, y) => x * y; const multiplyAndAdd5 = compose( add5, multiply ); multiplyAndAdd5(5, 2); // 15

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