Rephrase

Rewrite rules for JavaScript. Try it below or get it from GitHub.

/* forall a f g. */ /* a.map(f).map(g) */ /* a.map(compose(f, g)) */ function compose(f, g) { return function(x) { return f(g(x)); }; } function add(a) { return function(b) { return a + b; }; } // Do both operations in a single pass! console.log([1, 2, 3].map(add(1)).map(add(2))); Apply rewrite rules