VBScript conditional short-circuiting workaround

Question

I have a large classic ASP app that I have to maintain, and I repeatedly find myself thwarted by the lack of short-circuit evaluation capability. E.g., VBScript won\'t let you

Answer 1

Maybe not the best way, but it certainly works... Also, if you are in vb6 or .net, you can have different methods that cast to proper type too.

if cint( getVal( rs("blah"), "" ) )<> 0 then
  'do something
end if


function getVal( v, replacementVal )
  if v is nothing then
    getVal = replacementVal
  else
    getVal = v
  end if
end function

Answer 2

You may be able to just use Else to catch nulls, ""s, etc.

If UCase(Rs("myField")) = "THING" then
  'Do Things
elseif UCase(Rs("myField")) = "STUFF" then
  'Do Other Stuff
else
  'Invalid data, such as a NULL, "", etc.
  'Throw an error, do nothing, or default action
End If

I've tested this in my code and it's currently working. Might not be right for everyone's situation though.

Answer 3

Or perhaps I got the wrong end of the question. Did you mean something like iIf() in VB? This works for me:

myField = returnIf(isNothing(rs("myField")), 0, rs("myField"))

where returnIf() is a function like so:

function returnIf(uExpression, uTrue, uFalse)
    if (uExpression = true) then returnIf = uTrue else returnIf = uFalse : end if
end function