OpenEuphoria

Re: Should to_number return a sequence?

• Posted by irv 5 days ago
• 347 views

How about returning the original string when the conversion fails?

include std/get.e 
include std/types.e 
include std/console.e 
 
function val (object s) 
   if atom(s) then return s end if 
   for i = 1 to length(s) do 
     if s[i] > '9' then return s end if 
   end for 
   sequence v = value(s) 
    if v[1] = GET_SUCCESS then 
      return v[2] 
    else 
      return s 
    end if 
end function 
 
object a 
 
object tests = {"3.14","-1","+2.34",42,"99hello","Hi 44"} 
 
for i = 1 to length(tests) do 
 
	a = val(tests[i]) 
 
	if string(a) then  
	   display("[] failed!",{a}) -- show a warning or something 
	else  
	   display("[] => [] success",{tests[i],a}) -- use it. 
	end if 
 
end for 
 

irv@irv-desktop:~$ eui test 
3.14 => 3.14 success 
-1 => -1 success 
+2.34 => 2.34 success 
42 => 42 success 
99hello failed! 
Hi 44 failed!