CODEWITHSUNDEEP
ruby
ironsand
ironsand

Reputation: 15161

How to replace string in CSV::Table without destructive method

I want to replace string in CSV::Table. I could replace the string by using gsub! like this:

csv = CSV.table(@csv_file)
csv[:tag].each do |tag|
  tag.gsub!('Replace1','Replace2')
  tag.gsub!('Replace3','Replace4')
end

But I prefer to use gsub with method chain

csv[:tag].each do |tag|
  tag = tag.gsub('Replace1','Replace2').
            gsub('Replace3','Replace4')
end

Unfortunately it doesn't change the csv[:tag] strings. How can I replace string in CSV::Table class without using gsub!?

Upvotes: 0

Views: 52

Answers (1)

Amadan
Amadan

Reputation: 198334

gsub! returns self, so you can do the same thing:

tag.gsub!('Replace1','Replace2').
    gsub!('Replace3','Replace4')

If you want to replace a string with a string you already calculated, you can use String#replace:

new_tag = tag.gsub('Replace1','Replace2').
              gsub('Replace3','Replace4')
tag.replace(new_tag)

Upvotes: 1

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