for-of与for-in的区别

for (variable of iterable) {
    //statements
}

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const data = ['a', 'b', 3]
for (const v of data) {
    console.log(v); // a b 3
}

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for (variable in obj) {
    //statements
}

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const data = {
    [Symbol.for('a')]: 'a',
    name: 'name',
    '2': '2',
    '1': '1',
    b: 'b',
    a: 'a'
}
data.__proto__.sex = 'sex'
for (const k in data) {
    console.log(k) // 1 2 name b a sex
}

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for-of与for-in的区别

# for-of与for-in的区别

# for-of

# for-in

# 总结

# for-of

# for-in