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const pipe = (...fns) => fns.reduce((f, g) => (...args) => g(f(...args))); | |
const compose = (...fns) => fns.reduce((f, g) => (...args) => f(g(...args))); | |
// Example | |
const addFoo = str => str + 'foo'; | |
const addBar = str => str + 'bar'; | |
const addFoobar = pipe(addFoo, addBar); | |
const addBarfoo = compose(addFoo, addBar); | |
addFoobar('hello ') // hello foobar | |
addBarfoo('hello ') // hello barfoo |
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function lotto(amountOfNumbers, from, to) { | |
const numbers = []; | |
for (let i = 0; i < amountOfNumbers; i++) { | |
let number = null; | |
while (number === null || numbers.indexOf(number) > -1) { | |
number = Math.floor(Math.random() * (to - from + 1)) + from; | |
} | |
numbers.push(number); | |
} | |
return numbers.sort((a, b) => a - b); |