[Javascript] Create Your First Iterator in JavaScript

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Iterators are the foundation of generators. Much of the misunderstanding around generators comes from the lack of understanding iterators. An iterator has a Symbol.iterator property with an object that contains a next method which defines what is output each iteration.

let i = 0

const next = () => ({
    value: i++,
    done: i > 10
})

const iterator = {
    [Symbol.iterator]() {
        return {
            next
        }
    }
}

for (let value of iterator) {
    console.log(value)
}

[Javascript] Create Your First Iterator in JavaScript

标签：value   under   which   com   define   nes   hat   pre   ext   

原文地址：https://www.cnblogs.com/Answer1215/p/12111166.html