Re: SortBy + Sort Strings with apo.marks + CharacterCode
- To: mathgroup at smc.vnet.net
- Subject: [mg118276] Re: SortBy + Sort Strings with apo.marks + CharacterCode
- From: Peter <petsie at dordos.net>
- Date: Wed, 20 Apr 2011 04:26:13 -0400 (EDT)
- References: <iofs9a$s2b$1@smc.vnet.net>
Am 18.04.2011 01:14, schrieb Dr Andy D Kucar P2EE4 www.radio4u.com:
> Dear Mathgroup,
>
> Following on the original SortBy post and responses,
> I would like to expand with the following (Ver.4) funs
>
> In[17]
> Sort[{"January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November",
> "December", "English"}]
> Sort[{"January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November",
> "December", "English"}, #1> #2& ]
> ToCharacterCode[{"A2Z a2z Å Cc?? Cc Ð ?? \!\(Z\&?\)\!\(z\&?\)"}]
>
> Out[17]
> {"April", "August", "December", "English", "February", "January", "July", "June", "March", "May", "November", "October",
> "September"}
> this is OK
>
> Out[18]
> {"January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November",
> "December", "English"}
> this is NOT ok; #1>#2& has been ignored; the input has NOT been evaluated, i.e. sorted;
> why?
> How to Sort these String things?
>
...
>
> thank you, sincerely andy
>
Hi,
Less[] is not defined for strings:
"B"<"A"//FullForm
returns unevaluated: Less["B","A"]. Use OrderedQ:
In[1]:= Sort[{"January","February","March","April","May","June",
"July","August","September","October","November","December",
"English"}, OrderedQ[{##}]&]
Out[1]= {"April","August","December","English","February","January","
July","June","March","May","November","October","September"}
can't say anything about non-integer as character code ...
Peter