Iterables

Iterables.carbide.md

Iterables

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cell0.js

const mapWith = (fn, collection) =>
  ({
    [Symbol.iterator] () {
      const iterator = collection[Symbol.iterator]();

      return {
        next () {
          const {done, value} = iterator.next();

          return ({done, value: done ? undefined : fn(value)});
        }
      }
    }
  });

const a = [1,2,3,4];
const Evens = mapWith(x => x * 2, a);
const b = [];
for (const i of Evens) {
	console.log(i);
    b.push(i);
}

const c = (x) => x + " hello world";
console.log(c("hellow"));