Promise-compatible boolean AND and OR functions

pboolean.js

// Not completely sure these do the right thing on reject...

function pand(...args) {
  return args.length != 0 ? new Promise((resolve, reject) => {
    let [tc, fc] = [0, 0];
    function f(v) {
      tc += v ? 1 : 0;
      fc += v ? 0 : 1;
      if (tc == args.length) resolve(true);
      if (fc == 1) resolve(false);
    }
    args.forEach(v => Promise.resolve(v).then(f, reject));
  }) : Promise.resolve(true);
}

function por(...args) {
  return args.length != 0 ? new Promise((resolve, reject) => {
    let [tc, fc] = [0, 0];
    function f(v) {
      tc += v ? 1 : 0;
      fc += v ? 0 : 1;
      if (tc == 1) resolve(true);
      if (fc == args.length) resolve(false);
    }
    args.forEach(v => Promise.resolve(v).then(f, reject));
  }) : Promise.resolve(true);
}

const T = Promise.resolve(true);
const F = Promise.resolve(false);

pand(T, T).then(console.log); // true
por(T, F).then(console.log); // true
pand(por(F, T), F).then(console.log); // false

// can also mix Promises and primitive types
por(por(true, false), F).then(console.log); // true