John Sampson wrote in post #1089759:
> On 20/12/2012 18:22, Calvin Bornhofen wrote:
>> Hello,
>>
>> yes, there is (two, actually). They are called String#gsub and
>> String#gsub!, respectively.
>>
>> Regards
>>
>>
>>
> Many thanks - I did not know one could have a variable as an argument
>

Any place a literal, e.g. 10, 'hello', [1, 2, 3], is used, a variable 
containing one of those values can be used in its place.

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