本文介绍了如何将文件中的行读入数组?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
这就是我想要做的,但如果可能的话,使用单线:
This is what I want to do, but with a one-liner, if possible:
lines = Array.new
File.open('test.txt').each { |line| lines << line }
可能吗?
推荐答案
做如下:
File.readlines('test.txt')
阅读文档:
arup@linux-wzza:~> ri IO::readlines
= IO::readlines
(from ruby site)
------------------------------------------------------------------------------
IO.readlines(name, sep=$/ [, open_args]) -> array
IO.readlines(name, limit [, open_args]) -> array
IO.readlines(name, sep, limit [, open_args]) -> array
------------------------------------------------------------------------------
Reads the entire file specified by name as individual lines, and
returns those lines in an array. Lines are separated by sep.
a = IO.readlines("testfile")
a[0] #=> "This is line one\n"
If the last argument is a hash, it's the keyword argument to open. See IO.read
for detail.
示例
arup@linux-wzza:~/Ruby> cat out.txt
name,age,location
Ram,12, UK
Jadu,11, USA
arup@linux-wzza:~/Ruby> ruby -e "p File::readlines('./out.txt')"
["name,age,location\n", "Ram,12, UK\n", "Jadu,11, USA\n"]
arup@linux-wzza:~/Ruby>
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