Created
July 21, 2021 15:54
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function simpleIterator() { | |
const iterator = { | |
next() { | |
return { | |
value: "Hello, I'm an iterator", | |
done: true, | |
}; | |
}, | |
}; | |
const result = iterator.next(); | |
console.log(result.value); | |
console.log(result.done); | |
} | |
function helloWorld() { | |
const words = ["Hello", "World"]; | |
let index = 0; | |
const iterator = { | |
next() { | |
return { | |
value: words[index++], | |
done: index === words.length + 1, | |
}; | |
}, | |
}; | |
let result = iterator.next(); | |
console.log(result.value, result.done); | |
result = iterator.next(); | |
console.log(result.value, result.done); | |
result = iterator.next(); | |
console.log(result.value, result.done); | |
} | |
function helloWorldIterable() { | |
const words = ["Hello", "World"]; | |
let index = 0; | |
const iterator = { | |
next() { | |
return { | |
value: words[index++], | |
done: index === words.length + 1, | |
}; | |
}, | |
}; | |
const iterable = { | |
[Symbol.iterator]() { | |
return iterator; | |
}, | |
}; | |
for (let word of iterable) { | |
console.log(word); | |
} | |
} | |
function iteratorAndIterable() { | |
const iteratorAndIterable = { | |
next() { | |
// ... | |
}, | |
[Symbol.iterator]() { | |
return this; | |
}, | |
}; | |
} | |
function generatorExample() { | |
function* generateHelloWorld(name) { | |
yield "Hello"; | |
yield "World"; | |
yield name; | |
} | |
const generator = generateHelloWorld("Tomasz"); | |
for (let word of generator) { | |
console.log(word); | |
} | |
} | |
generatorExample(); |
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