Could someone explain this (strange) behavior? Why is the length in the first example 3 and not 2, and most importantly, why is the length in the second example 0? As long as the keys are numerical, length works. When they are not, length is 0. How can I get the correct length from the second example? Thank you.Could someone explain this (strange) behavior?
阅读背景：
对象数组的Javascript数组长度不正确
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