Sorting

> Hi Squeakers,
>
> I have a string: 'Hello'.
>
> To reverse the letters I write:
>
>  a := 'Hello' reverse.
>
> And I get 'olleH'.
>
> How do I sort the letters alphabetically? So I get 'eHllo'?
>
>  a := 'Hello' sortBy: [:x :y | a < b ]
>
> What parameter do you use to sort the letters? Do you have to convert them
> to a number, an Ascii or Unicode number first, and then sort those numbers?
>

> Hi Squeakers,
>
> I have a string: 'Hello'.
>
> To reverse the letters I write:
>
>  a := 'Hello' reverse.
>
> And I get 'olleH'.
>
> How do I sort the letters alphabetically? So I get 'eHllo'?
>
>  a := 'Hello' sortBy: [:x :y | a < b ]
>
> What parameter do you use to sort the letters? Do you have to  
> convert them
> to a number, an Ascii or Unicode number first, and then sort those  
> numbers?

> << #sortBy: does not return a string. >>
>
> I was surprised that the collection returned does not respond to a  
> message like asString. Anyway, this short code works:
>
> t _ ('The cow jumped over the moon' sortBy: [ :x :y | x < y ]).
> s _ String new: t size.
> 1 to: t size do: [ :i | s at: i put: (t at: i) ].
>
> You can also apply this approach based on inject:into:
>
> t _ ('The cow jumped over the moon' sortBy: [ :x :y | x < y ]).
> t inject: String new into: [ :x :y | x, (String with: y) ].
>
> Mark
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