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Topic: Swap lowercase and uppercase letters
Replies: 2   Last Post: Mar 20, 2013 4:22 AM

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Albert Retey

Posts: 688
Registered: 7/15/08
Re: Swap lowercase and uppercase letters
Posted: Mar 20, 2013 4:22 AM
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Hi,
>>
>> I have the following example: "hELLO THERE!"
>>
>> Using Mathematica 8.0.4, how can I swap the lowercase and uppercase
>> letters to output,
>>
>> "Hello there!"
>>

>
> This is a reliable method that will work with scripts other than
> Roman (such as Greek or Cyrillic) and will also work with many
> accented letter:
>
> StringJoin@ Replace[Characters["hELLO THERE!"], {c_?LowerCaseQ :>
> ToUpperCase[c], c_?UpperCaseQ :> ToLowerCase[c]}, {1}]
>
> Simply replacing A, B, ..., Z with a, b, ..., z is not a good option
> because it won't handle accented letters (unless you include those as
> well, which is a lot of work)
>


or, slightly simpler:

StringReplace["hELLO THERE!", {
c_?UpperCaseQ :> ToLowerCase[c],
c_?LowerCaseQ :> ToUpperCase[c]
}]

regards,

albert




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