str = "Hello☺ World☹"
Expected output is:
"Hello:) World:("
I can do this: str.gsub("☺", ":)").gsub("☹", ":(")
Is there any other way so that I can do this in a single function call?. Something like:
str.gsub(['s1', 's2'], ['r1', 'r2'])
Answer
Since Ruby 1.9.2, String#gsub accepts hash as a second parameter for replacement with matched keys. You can use a regular expression to match the substring that needs to be replaced and pass hash for values to be replaced.
Like this:
'hello'.gsub(/[eo]/, 'e' => 3, 'o' => '*') #=> "h3ll*"
'(0) 123-123.123'.gsub(/[()-,. ]/, '') #=> "0123123123"
In Ruby 1.8.7, you would achieve the same with a block:
dict = { 'e' => 3, 'o' => '*' }
'hello'.gsub /[eo]/ do |match|
dict[match.to_s]
end #=> "h3ll*"