如何读取文件到数组的行？

这就是我想要做的，但如果可能的话，使用单线程：

lines = Array.new File.open('test.txt').each { |line| lines << line } 

可能？

Answer 1

请执行以下操作：

 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. 

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>