如何实际将换行符写入字符串

Question

我该怎么做

content[i].gsub("\n", "\n")

将（类似的）写入文件

str = "some text\n"

我正在编写一段代码来获取一个文件并从中构建一个字符串，如果有帮助的话，可以将其插入回您使用的源代码中

如果我弄错了，我的错误实际上是在代码的其他地方，这里是：

#!/bin/usr/ruby
#reads a file and parses into a single string declaration in language of choice
#another little snippet to make my job easier when writing lots of code
#programmed by michael ward
# h3xc0ntr0l@gmail.com | gists.github.com/michaelfward


# ***************************************
#              example scrips
#  with writefiles 
#   | writefiles [file with paths] [file to write*]
#   | makestring [file to write* (actually is read, but same as above)] [lang] 
#****************************************


def readFile(path)
  fd = File.open(path, "r")
  content = []
  fd.each_line {|x| content.push(x)}
  content = fixnewlines(content)
  str = content.join()
  str
end

def fixnewlines(content)
  content.each_index do |i|
    content[i].gsub("\n", "\n")
  end
end

def usage
  puts "makestring [file to read] [language output]"
  exit
end

langs = {"rb"=>"str =", "js" => "var str =", "c"=> "char str[] ="}

usage unless ARGV.length == 2
lang = ARGV[1]
path = ARGV[0]
str = readFile(path)
if langs[lang] == nil
  if lang == "c++" || lang == "cpp" || lang == "c#"
    puts "#{lang[c]}#{str}"
  else
    puts "unrecognized language found. supported languages are"
    langs.each_key {|k| puts "   #{k}"}
    exit
  end
else
  puts "#{langs[lang]} #{str}"
end

Answer 1

这取决于您使用的平台。 Unix 使用 \n 作为行结束字符，而 windows 使用 \r\n。看起来你正在用 \n 替换所有换行符，它转义了我不希望在任何一个平台上工作的换行符。

Answer 2

只需删除 fixnewlines 并更改 readFile:

def readFile(path)
  File.read(path).gsub("\n", '\n')
end

希望对您有所帮助。在 Windows 上使用 \r\n 而不是 \n。单括号内的斜线无需转义。

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