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减少 Javascript:掌握基础知识
reduce Javascript 方法所做的就是循环遍历项目,每次循环遍历我们都会返回一个单独的项目,并获得从 reduce () 返回的先前值。 如果它是 reduce () 中的第一项,我们只会返回零,因为这是我们的默认值。 例如,如果我们将默认值更改为 50,则会影响数组。
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