useful functional programming snippets (in Typescript)

fp.ts

/*
A set of useful functional programming snippets
*/

/** pipe
 * @param fns Function[] - array of functions to execute
 *
 */
const pipe = (...fns: Function[]) => init => fns.reduce((acc, fn) => fn(acc), init);

/* example: 
  const addOne = (x: number) => x + 1
  const multiplyByTen = (x: number) => x * 10
  const divideByTwo = (x: number) => x / 2

  const result = pipe(
    addOne,
    multiplyByTen,
    divideByTwo,
  )(10); //55
*/