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- // Array.from方法用于将两类对象转为真正的数组:类似数组的对象(array-like object)和可遍历(iterable)的对象(包括ES6新增的数据结构Set和Map)
- // example1
- let arrayLike = {
- '0': 'a',
- '1': 'b',
- '2': 'c',
- length: 3
- };
- let arr2 = Array.from(arrayLike); // ['a', 'b', 'c']
- // example 2
- Array.from('hello') // ['h', 'e', 'l', 'l', 'o']
- // example 3
- let namesSet = new Set(['a', 'b'])
- Array.from(namesSet) // ['a', 'b']
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