layzee

A minimal lazy iterator implementation

install

$ npm install layzee

docs

usage

import layzee from 'layzee'

let range = layzee.range
let iter = layzee([1,2,3,4,5])

for (let o of iter) {
  // do stuff
}

// using range
let r = range(0, 100) // generates [10..20)
r.filter(o => o % 11 === 0).take(3)
r.next() // { value: 0, done: false}
r.value() // [11, 22] iterator is fully realized
r.value() // [11, 22] - result is cached after first call to value()
r.next() // { done: true }

// using generators
  function* genEven () {
    let i = 0
    while (i % 2 === 0) {
      i += 2
      yield i
    }
  }

  let even5 = layzee(genEven()).take(5)
  even5.value() // [2,4,6,8,10]

license

MIT