erlang file 追加写

最新推荐文章于 2025-01-10 08:17:15 发布

原创最新推荐文章于 2025-01-10 08:17:15 发布 · 1.9k 阅读

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本文介绍如何在Erlang中进行文件操作，特别是如何避免每次读取时覆盖文件内容，重点讨论file:open函数的参数设置，以实现文件的追加写入。

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erlang 进行文件操作

{ok, Write} = file:open("test.txt",[write]),
io:format(Write, "~s", ["string"] ).

但是这样做每次读都会覆盖文件内容

{ok, Write} = file:open("test.txt",[<span style="color:#FF0000;">append</span>]),
io:format(Write, "~s", ["string"] ).

这样就可以追加

其实知识在

file:open的参数里有。。不过有时候真心翻着麻烦

write

    The file is opened for writing. It is created if it does not exist. If the file exists, 
    and if write is not combined with read, the file will be truncated.

append

    The file will be opened for writing, and it will be created if it does not exist. 
    Every write operation to a file opened with append will take place at the end of the file.