数组操作-数组元素赋值

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通过Array创建
const array = Array(20)
for (let i = 0; i < array.length; i++) {
	array[i] = i;
}
ready
直接创建
const array = [,,,,,,,,,,,,,,,,,,,,]
for (let i = 0; i < array.length; i++) {
	array[i] = i;
}
ready

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