1  const scream = str => str.toUpperCase()
2  const exclaim = str => `${str}!`
3  const repeat = str => `${str} ${str}`
4
5  const string = 'Hello world'
6
7  // Nested
8  // const result1= repeat(exclaim(scream(string)))
9  // console.log(result1)
10 // HELLO WORLD! HELLO WORLD!
11
12 // Instead of nesting, compose your functions into a new function
13 const compose = (...fns) => x =>
14    fns.reduceRight((acc, fn) => fn(acc), x)
15
16 const enhance = compose(repeat, exclaim, scream)
17 const result2 = enhance(string)
18 console.log(result2)
19 // HELLO WORLD! HELLO WORLD!