Do supports destructuring binding

[kgtkr]

🚀 Feature request

Related #35

Do does not support destructuring binding.

do
  (a, b) <- m
  let (a, b) = x
  ...

Suggested Solution

.bindD(m.map(x => ({ a: x.a, b: x.b }))) === .bind("tmp", m).letL("a" ,({ tmp }) => tmp.a).letL("b" ,({ tmp }) => tmp.b)
.bindDL(() => m.map(x => ({ a: x.a, b: x.b }))) === .bindL("tmp", () => m).letL("a" ,({ tmp }) => tmp.a).letL("b" ,({ tmp }) => tmp.b)
.letD({ a: 1, b: 2 }) === .sequenceS({ a: M.of(1), b: M.of(2) })
.letDL(() => ({ a: 1, b: 2 })) === .sequenceSL(() => ({ a: M.of(1), b: M.of(2) }))

[cyberixae]

I just created PR #59 that implements chain and chainL. I'm not sure if it solves the problem but maybe you could take a look at it.