Description

Function composition is a common technique in functional programming where multiple functions are combined into a single pipeline.
Each function in the chain passes its output as input to the next one — making the logic more modular and readable.

In this challenge, you’ll implement a simple pipe function that takes multiple single-argument functions and executes them in sequence.

Your Task

Implement a function pipe(...functions) that:

  • Takes any number of unary (single-argument) functions.
  • Returns a new function that takes one input.
  • When executed, passes the input through all the provided functions from left to right.
  • Returns the final result after all functions are applied.

Example

Input

const val = { salary: 10000 };

const getSalary = (person) => person.salary;
const addBonus = (netSalary) => netSalary + 1000;
const deductTax = (grossSalary) => grossSalary - grossSalary * 0.3;

const result = pipe(getSalary, addBonus, deductTax)(val);
console.log(result);

Output

7700

Explanation

  1. getSalary({ salary: 10000 }) → 10000
  2. addBonus(10000) → 11000
  3. deductTax(11000) → 7700
    Final output = 7700

Expected Behavior

  • Executes functions in the given order
  • Passes each output as input to the next
  • Returns final value after all functions are applied
  • Supports any number of functions