sequentially.js

module.exports = function sequentially(fns) {
  var results = [], last;
  for (var k = 0; k < fns.length; ++k) 
    if (k === 0) results.push(last = fns[k]());
    else results.push(last = last.then(fns[k]))
  return results;
}

// Usage

function createTables() {
  return Promise.all(sequentially(
    create('table1', function(t) { ... }),
    create('table2', function(t) { ... }),
    create('table3', function(t) { ... }))
  .then(function(values) {
    // do stuff and return something
  });
}