seqqu v0.0.1

seqqu - put everything into sequence

What is this:

A library to make Promise(ES6+) based sequential structure (use like javascript array)

How to use this:

seqqu.Map

// prepare array
var arr = [...];

// make seq from the array
var seq = seqqu.Map(
    arr,
    function(el, resolve, reject) {
        // do anything...
        ...
        // if you got acceptable result, just call the resolve with the result.
        resolve(result);
        // if not, just call the reject.
        reject(err);
    }
);

// let's iterate over the seq with the results!
seq.forEach(function(result, idx, self) {
    ...
});

seqqu.Seq

// make sequence (which must manipulate same type values)
var seq = seqqu.Seq(
  0,               // initial value
  function(v) {
    return v + 1;  // determine next value
  }
);

// let's iterate over the sequence with the results!
seq.reduce(function(carried, result, idx, self) {
  if (idx < 6) {
    return seqqu.fin;
  } else {
    return carried.concat(result);
  }
}, [], function(reduced) {
    assert.equal(reduced, [0, 1, 2, 3, 4, 5], 'Ok, good feeling.');
});

seqqu.New

// make arbitrary sequence
var seq = seqqu.New(
  0,                // initial value
  function (v) {
    return v + 1;   // determin the next
  },
  function (el, resolve, reject, self) {
    var added = el + (self.latestResult || 0); // you can access previous value via self.latestResult
    console.log(" " + added + " ");
    resolve(added);                            // don't forget to resolving promise
  }
);

seq.forEach(function (v, i) {
  if (i > 100) {
    return seqqu.fin;  // To exit seqqu looping, you must return seqqu.fin
  }
});