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FunctionalProgrammingintermediate

Multiplier factory — function returning function

📖 Usage Example
function multiplier(factor) {
  return x => x * factor;
}
const double = multiplier(2);
double(5); // 10

A function factory returns a specialized function — a classic higher-order pattern.

Factory Functions

A factory function returns new functions with customized behavior.

Challenge: Create a multiplierFactory function that returns a new function. Each returned function multiplies its argument by a specific factor.

💡 Hints (3)
  • • Factory returns a function
  • • The returned function closes over factor
  • • Each call to factory creates a new function