在Ruby中传递变量如何？

Question

Following my other question that was brilliantly solved How to generate a file with the names of the methods in class?

Now I have another problem regarding code:

basedir = "."
files =  Dir.new(basedir).entries
files.each do |file|
  tests = file.match(/(.+)_tests.rb/)
  puts tests if tests
end

#here i need to use "tests" variable again .. 

tests.each do |test|
  File.open(test).each_line do |line|
    match = line.match(/def (.+)/)
    puts match[1] if match
  end
end

Gives me the mistake:

  match_test_methods.rb:10: undefined local variable or method `tests' for main:Object (NameError)

I guess, the problem is that "tests" variable is born and buried in the files.each do method. How can I use it globally? Nothing worked so far...

Thanks.

Answer 1

You could define it before the iteration:

tests = nil
basedir = "."
files =  Dir.new(basedir).entries
files.each do |file|
  tests = file.match(/(.+)_tests.rb/)
  puts tests if tests
end

# now tests will be available here

Answer 2

You could condense this down into a single loop, to negate the need to define tests at a higher level.

basedir = "."
files =  Dir.new(basedir).entries
files.each do |file|
  tests = file.match(/(.+)_tests.rb/)
  if tests
    puts tests
    File.open(file).each_line do |line|
      match = line.match(/def (.+)/)
      puts match[1] if match
    end
  end
end

Answer 3

Solved the problem by fixing the code:

tests = []

basedir = "."
files =  Dir.new(basedir).entries

tests = files.select do |file|
   file.match(/(.+)_tests.rb/)
end

tests.each do |test|
   puts test
   File.open(test).each_line do |line|
   if match = line.match(/def (.+)/)
   puts match[1]
   end
 end
end

The problem was that the first method didn't return the array..