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Re: sorting the chars in a string [message #58634 is a reply to message #58633]

Mon, 11 February 2008 07:02

lasse
Messages: 48
Registered: February 2007

Member

On 11 Feb, 15:39, elwood <epolo...@uwsp.edu> wrote:
> I've been trying to think of a simple way to alphabetically sort an
> individual string
>
> Say I have the string x="abdcf"
> Is there a way to sort it and return a new string which is in correct
> alphabetical order,
> and/or reverse alphabetical order.
>
> Maybe its obvious, but I havent worked with strings too much in IDL
> and I cant seem to find
> a way to do this (strsplit and stregex somehow??)
>
> Thanks,
> Elisha

Hi there,

convert the string to an array of bytes, like so

test = 'sfbvvaedfvtrgvsdvrbnyhtfc'
tmp = byte(test)

This conversion happens according to the ASCII table, if I am not
mistanken, which connects a number to a character in ascending order,
on my machine a = 97, b = 98 and so on. Then sort that byte array and
build up the string again.

sort_inds = sort(tmp)
new_string = string(tmp[sort_inds])
print, new_string

That works, use REVERSE() if you want the sorting done from z-a.

Cheers
Lasse Clausen

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[Message index]

		Re: sorting the chars in a string By: Spon on Mon, 11 February 2008 08:23
		Re: sorting the chars in a string By: Foldy Lajos on Mon, 11 February 2008 07:37
		Re: sorting the chars in a string By: elwood on Mon, 11 February 2008 07:36
		Re: sorting the chars in a string By: lasse on Mon, 11 February 2008 07:02

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