From: Lionel Bouton <lionel-subscription@...>
Date: 2007-09-11T23:18:43+09:00
Subject: Re: Substitution with Hash

Robert Klemme wrote:
>
>> h = {"&#126;" => "~"}
>>
>> "hmm &#126;'.split(/ /).map{|c| h[c] || c}.join(' ')
>>
>> Outputs hmm ~, but obviously doing things like question marks wont work,
>> Maybe i'll have to use loops and string#tr
>>     
>
> I'd rather not do the split step, IMHO direct replacement will be faster:
>   

If it's all for html entities yes. I'm not sure of what the actual use
case is though.

> h = {"#126" => "~"}
> s.gsub(/&([^;]+);/) {|c| h[c] || "&#{c};"}
>
> Btw, I believe there are standard classes that do this type of
> replacement (entities in HTML documents) - maybe it's in CGI.
>   

The htmlentities gem (more robust than CGI with UTF-8...) is quite good.