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path

fmt.Println(path.Base("https://pic3.zhimg.com/v2-28fd28c8a5ffc58b6ff5e9b1d2c586fe.jpg"))

返回

v2-28fd28c8a5ffc58b6ff5e9b1d2c586fe.jpg

也就是最后一个/后面的部分 其实现的原理很简单

if i := strings.LastIndex(path, "/"); i >= 0 {
        path = path[i+1:]
    }

找到最后一个"/",然后通过字符串的切割完成

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