From: Bulat Ziganshin <bulatz@...>
Date: 2002-12-11T19:53:17+09:00
Subject: Re: elseif?

Hello Dave,

lisp and clipper are greate languages but... :) Charles Wetherell in
"Etudes for Programmers" (1978) describes language Mini which has
operator closest to Ruby case:

select str of
  case ("on"):     return 1;
  case ("off",""): return 0;
  otherwise:       return -1;
end select

it's the beast SELECT construction i ever seen and i was very pleased
what ruby includes just the same SELECT operator



Tuesday, December 10, 2002, 8:54:18 PM, you wrote:

>> If the latter, it has already existed in another language and looks like
>> this:
>> 
>> (cond
>>   ((expr1) (stmt1))
>>   ((expr2) (stmt2))
>>   ((expr3) (stmt3))
>>   ...
>>   ((exprN) (stmtN))
>> )

DP> Those who know and remember Clipper (and Fox, and probably dBase) will also
DP> recognise its case statement as being such a facility:

DP> ,----
DP> | Do Case
|    Case x >> 0
|       ? "x >> 0"
DP> |    Case x == 0
DP> |       ? "x == 0"
DP> |    Case x < 0
DP> |       ? "x < 0"
DP> |    Otherwise
DP> |       ? "Something wonderful has happened"
DP> | EndCase
DP> `----




-- 
Best regards,
 Bulat                            mailto:bulatz@integ.ru