在Ruby中一次读取文件N行 [英] Reading a file N lines at a time in ruby

问题描述

我有一个大文件(数百兆)，其中包含文件名，每行一个.

I have a large file (hundreds of megs) that consists of filenames, one per line.

我需要遍历文件名列表，并为每个文件名创建一个进程.我一次最多要8个分支的进程，并且我不想一次将整个文件名列表读入RAM.

I need to loop through the list of filenames, and fork off a process for each filename. I want a maximum of 8 forked processes at a time and I don't want to read the whole filename list into RAM at once.

我什至不知道从哪里开始，有人可以帮我吗?

I'm not even sure where to begin, can anyone help me out?

推荐答案

File.foreach("large_file").each_slice(8) do |eight_lines|
  # eight_lines is an array containing 8 lines.
  # at this point you can iterate over these filenames
  # and spawn off your processes/threads
end

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