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at 相对索引方法

介绍 JavaScript 中的 at 方法,用于根据正负索引查找数组或字符串元素,支持从末尾开始查找(-1 表示最后一个元素)。

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at 方法 - 根据索引查找数组(或字符串)元素,负数则是从最后开始(-1),也支持正索引(0)。小巧方便。原文地址:http://www.deathghost.cn/article/javascript/104

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