CODEWITHSUNDEEP
regexruby
stuckoverflow24
stuckoverflow24

Reputation: 61

Ruby regex to replace character sequence

So I have this string 

x = "{"1"=>"test","2"=>"Another=>Test","3"=>"Another=>One"}"

and I want to replace the rocket symbol that is beside a character to a pipe symbol. so the result is

x = "{"1"=>"test","2"=>"Another|Test","3"=>"Another|One"}"

I have this code right now

if x =~ /(=>\w)/).present?
    x.match(/=>\w/) do |match|
      #loop through matches and replace => with |
    end
end

So basically my question is how do I loop through a matched by regex and replace the rocket sign to a pipe?

Upvotes: 0

Views: 112

Answers (1)

Schwern
Schwern

Reputation: 164809

gsub with a positive look-ahead will do it.

x = %q[{"1"=>"test","2"=>"Another=>Test","3"=>"Another=>One"}]
x.gsub!(%r{=>(?=\w)}, '|')
puts x

A look-ahead (or look-behind) matches, but does not include that bit in the match.

Though I think %r{=>(?=[^"])}, a => which is not in front of a quote, is more correct.

x = %q[{"1"=>"what about => a space?","2"=>"Or=>(this)"}]
x.gsub!(%r{=>(?=[^"])}, '|')
puts x

Upvotes: 2

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