Here is a small program generating x to y numbers using generator in JS later we will implement equivalent function by using closure.
Generating x to y numbers using Generator
function *genXtoY(x, y){ while(x < y) yield x++ return x++ } const _iter = genXtoY(1, 5) _iter.next() //{ value: 1, done: false } _iter.next() //{ value: 2, done: false } _iter.next() //{ value: 3, done: false } _iter.next() //{ value: 4, done: false } _iter.next() //{ value: 5, done: true } _iter.next() //{ value: undefined, done: true } Generating x to y numbers using closure
const genXtoY = (x, y) => { const next = () => { if(x <= y) return {value: x++, done: (x - 1 === y)} return {value: undefined, done: true} } return {next} } const _iter = genXtoY(1, 5) _iter.next() //{ value: 1, done: false } _iter.next() //{ value: 2, done: false } _iter.next() //{ value: 3, done: false } _iter.next() //{ value: 4, done: false } _iter.next() //{ value: 5, done: true } _iter.next() //{ value: undefined, done: true } 
Top comments (0)