kefir/src/one-source/skip.js

Reactive Programming library for JavaScript inspired by Bacon.js and RxJS with focus on high performance and low memory usage

import {createStream, createProperty} from '../patterns/one-source'

const mixin = {
  _init({n}) {
    this._n = Math.max(0, n)
  },

  _handleValue(x) {
    if (this._n === 0) {
      this._emitValue(x)
    } else {
      this._n--
    }
  },
}

const S = createStream('skip', mixin)
const P = createProperty('skip', mixin)

export default function skip(obs, n) {
  return new (obs._ofSameType(S, P))(obs, {n})
}