iterator-sequencer v0.1.0

iterator-sequencer

Sequencer-like Iterator

convert to a sequencer-like iterator from an iterator that generates { time: number }.

Installation

$ npm install iterator-sequencer

API

IteratorSequencer

• constructor(iter: Iterator, interval: number)

Instance methods

• next(): { done: boolean, value: object[] }
• [Symbol.iterator]()

Examples

import IteratorSequencer from "iterator-sequencer";

let baseIterator = [
  { time: 0.0 },
  { time: 1.0 },
  { time: 1.5 },
  { time: 2.0 },
  { time: 4.0 },
  { time: 8.0 },
][Symbol.iterator]();

let iter = new IteratorSequencer(baseIterator, 1);

// 0.000
iter.next(); // { done: false, value: [ { time: 0.0 } ] }
// 1.000
iter.next(); // { done: false, value: [ { time: 1.0 }, { time: 1.5 } ] }
// 2.000
iter.next(); // { done: false, value: [ { time: 2.0 } ] }
// 3.000
iter.next(); // { done: false, value: [] }
// 4.000
iter.next(); // { done: false, value: [ { time: 4.0 } ] }
// 5.000
iter.next(); // { done: false, value: [] }
// 6.000
iter.next(); // { done: false, value: [] }
// 7.000
iter.next(); // { done: false, value: [] }
// 8.000
iter.next(); // { done: false, value: [ { time: 8.0 } ] }
// 9.000
iter.next(); // { done: true, value: [] }

{ done: true } is adjusted by duration of the last item if exists.

import IteratorSequencer from "iterator-sequencer";

let baseIterator = [
  { time: 0.0, duration: 2 },
  { time: 1.0, duration: 2 },
  { time: 1.5, duration: 2 },
  { time: 2.0, duration: 2 },
  { time: 4.0, duration: 2 },
  { time: 8.0, duration: 2 },
][Symbol.iterator]();

let iter = new IteratorSequencer(baseIterator, 1);

// 0.000
iter.next(); // { done: false, value: [ { time: 0.0, duration: 2 } ] }
// 1.000
iter.next(); // { done: false, value: [ { time: 1.0, duration: 2 }, { time: 1.5, duration: 2 } ] }
// 2.000
iter.next(); // { done: false, value: [ { time: 2.0, duration: 2 } ] }
// 3.000
iter.next(); // { done: false, value: [] }
// 4.000
iter.next(); // { done: false, value: [ { time: 4.0, duration: 2 } ] }
// 5.000
iter.next(); // { done: false, value: [] }
// 6.000
iter.next(); // { done: false, value: [] }
// 7.000
iter.next(); // { done: false, value: [] }
// 8.000
iter.next(); // { done: false, value: [ { time: 8.0, duration: 2 } ] }
// 9.000
iter.next(); // { done: false, value: [] }
// 10.000
iter.next(); // { done: true , value: [] }

License

MIT