Why can't I split a string on control characters?

问题

I am trying to split a line when I find the characters ^C or ^B together. For some reason it is not splitting properly.

I have been on Rubular and tested this and supposedly it should split it.

The lines that I am reading in and trying to split look something like this:

SOME_KEY^CSOME_VALUE^BSOME_KEY^CSOME_VALUE

The code is:

final_array = []
temp_array = []

array__with_all_of_the_data.each do |x|
  temp_array = x.split(/\^C/)
  temp_array.each do |y|
    final_array << y.split(/\^B/)
  end  
  @final_array << final_array.join(",")
end

回答1:

Split using the regular expression /\^[BC]/:

>> 'SOME_KEY^CSOME_VALUE^BSOME_KEY^CSOME_VALUE'.split(/\^[BC]/)
=> ["SOME_KEY", "SOME_VALUE", "SOME_KEY", "SOME_VALUE"]

If you want replace \B / \C with ,, use gsub instead of split + join:

>> 'SOME_KEY^CSOME_VALUE^BSOME_KEY^CSOME_VALUE'.gsub(/\^[BC]/, ',')
=> "SOME_KEY,SOME_VALUE,SOME_KEY,SOME_VALUE"

来源：https://stackoverflow.com/questions/18211617/why-cant-i-split-a-string-on-control-characters