how to apply gsub on string elements within an array?

Question

for example, I have an array which is structured as follow:

my_array = [["..\\..\\..\\Source\\file1.c"], ["..\\..\\..\\Source\\file2.c"]]

This array is produced by this code:

File.open(file_name) do |f|
    f.each_line {|line|
      if line =~ /<ClCompile Include="..\\/
        my_array << line.scan(/".*.c"/)
      end
    }
  end

Later in the code I'm working on the array:

my_array .each {|n| f.puts n.gsub(/\\/,"//")}

As you can see, would like to replace all the backslashes with forward slashes on the elements within the array. The elements presents paths to source files. On the end I will output these paths within an other file.

I get this error:

undefined method `gsub' for [["..\\..\\..\\Source\\file1.c"], ["..\\..\\..\\Source\\file2.c"]]:Array (NoMethodError)

Any idea?

Answer 1

You have an array of arrays, so if you want to keep it like that, you would need to have 2 loops.

Otherwise, if you change your variable to this: my_array = ["..\\\\..\\\\..\\\\Source\\\\file1.c", "..\\\\..\\\\..\\\\Source\\\\file2.c"] your code should work.

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UPDATE

if you can not control my_array , and it is always an array of one item arrays, perhaps this is cleanest:

my_array.flatten.each {|n| puts n.gsub(/\\/,"//")}

What it does is transforms two-dimensional array in one-dimensional.

Answer 2

my_array.flatten.each { |n| f.puts n.tr('\\', '/') }

Answer 3

As others have pointed out, you are calling gsub on an array, not the string within it. You want:

my_array.each {|n| puts n[0].gsub(/\\/,"//")}