Question

我一直在运行这个意外的错误令牌。我希望程序在不调用ruby的情况下运行。例如，我应该能够ruby program1.rb而不是program1.rb poem.txt。

这是错误消息：

 program1.rb --backwards poem.txt
./program1.rb: line 1: syntax error near unexpected token `('
./program1.rb: line 1: `def backlines(line_array)'

这是我的代码：

def backlines(*line_array)

end

def backwards(line_array)

end

def backchars(line_array)

end

def main
  file = File.new(ARGV[1], "r") do |file|
  line_array = file.readlines
  *line_array = line_array.reverse
  if ARGV[0] == "--backlines"
    *backwards_poem = backlines(line-array)
    #you can manipulate "backwards_poem" however you want
  elsif ARGV[0] == "--backwards"
    backwards(line_array)
  elsif ARGV[0] == "--backchars"
    backchars(line_Array)
  end

  # passing a *line_array into a function
end

main

Answer 1

您是否在顶部的脚本中执行了ruby？例如：

#!/usr/bin/ruby

Answer 2

#!/usr/bin/ruby

def backlines(*line_array)

end

def backwards(line_array)

end

def backchars(line_array)

end

def main
  puts ARGV
  # File open not new ... this block requires the end below.
  File.open(ARGV[1], "r") do |file|
    line_array = file.readlines
    *line_array = line_array.reverse 
    if ARGV[0] == "--backlines"
      *backwards_poem = backlines(line_array)
      #you can manipulate "backwards_poem" however you want
    elsif ARGV[0] == "--backwards"
      backwards(line_array)
    elsif ARGV[0] == "--backchars"
      backchars(line_array)
    end
  end
  # passing a *line_array into a function
end

如果你打电话给./program1.rb --backwards file

，这应该会让你失望

你也有line-array，line_array和line_Array，我认为它应该是一个变量。

语法错误意外令牌＆＃39;（＆＃39;

2 个答案: