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YO! esnext fat arrows, you failed me: jsconsole.com/?a%20%3D%20%5B1%2C2%2C3%2C4%5D%3B%20console.log(a.map(v%20%3D%3E%20%7B%20value%3A%20v%20%7D))%3B%20console.log(a.map(v%20%3D%3E%20v%20*%202%20))%3B (first result should be array of objects…BECAUSE I SAID!!!)