为啥 Java 或者 go 的标准库没有实现倒序按行读取文件,这感觉也是很常见的需求 - V2EX
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awesomePower

为啥 Java 或者 go 的标准库没有实现倒序按行读取文件,这感觉也是很常见的需求

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  •   awesomePower 4h 8m ago 370 views
    如题,奇怪很久了,这也是很常见的需求,标准库竟然不提供,只有正序按行读取文件
    whoosy
        1
    whoosy  
       3h 39m ago
    我要是维护者,我也不加。
    标准库的设计原则应该是要提供高效、确定性的基础能力,一旦开放这种性能堪忧的能力,要是有人无脑拿它去处理 G 级别的日志文件,内存爆了又该吐槽语言不行了。
    gadfly3173
        2
    gadfly3173  
       3h 8m ago via Android
    你可以用 randomaccessfile 里的 seek 实现一个差不多的,只要你不实现行号的计算,只是从文件尾往前读的话应该也不会很慢。
    newaccount
        3
    newaccount  
       2h 2m ago
    除了 access_log 但凡有个 error detail 都是乱的,这算什么常见需求
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