using gsub in ruby strings correctly -

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i have expression:

channelname = rhash["channel"].gsub("'", " ")

it works fine. however, can substitute 1 character it. want add few more characters substitue. tried following:

channelname = rhash["channel"].gsub(/[':;] /, " ")

this did not work, there no substitution done on strings , no error message. tried this:

channelname = rhash["channel"].gsub!("'", " ")

this lead string blank. absolutely not desired.

i have gsub method substitute following characters space in string: 

 ' ; :

my questions:

  1. how can structure gsub method instances of above characters replaced space?

  2. what happening gsub! above returning blank.

your second attempt close. problem left space after closing bracket, meaning looking 1 of symbols followed space.

try this:

channelname = rhash["channel"].gsub(/[':;]/, " ")

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