My Switch is returning wrong help

[DreamVB]

I am trying to use a switch statement to compare chars eg A-Z so if a vaild chat such as A is sent then it will returm true, say you pass something like ÿ it will return false but it seems to return true. very odd like

Func IsInSet($char)
    Switch StringUpper($char)
        Case "A" To "Z", "a" To "z"
            Return 1
        Case Else
            Return 0
    EndSwitch
EndFunc   ;==>IsInSet

MsgBox(1, "", IsInSet("ÿ")) ; This seems to return 1 even tho it not even in the set why?

[jchd]

That looks like a bug with the Switch statement in this case. I advise you post a ticket.

In the meantime you can simply use this:

MsgBox(1, "", StringRegExp("ÿ", "[[:alpha:]]"))

[DreamVB]

hi Thanks for the reply I did however find another way around using the values of the chars and seems to work.

Func IsInSet($char)
    Switch Asc(StringUpper($char))
        Case 48 To 57
            Return 1
        Case 65 To 90
            Return 1
        case 32
            Return 1
        Case Else
            Return False
    EndSwitch
EndFunc   ;==>IsInSet

MsgBox(1,"",IsInSet("ÿ"))

[Gianni]

I think that the Switch statement is to be used with "numeric" values, expecially if you use the range parameter <value> To <Value>
in fact the documentation says <Value> an not <expression> when referring to the range.
it seems that the use of "Strings" it works as well, only if you compare a single <expression> in the Switch construct and not using the "To" parameter as range separator.
In case of the need to compare ranges you could transform "A" to "Z" in numeric values, for example Asc("A") to Asc("Z") and in this way it works.

Func IsInSet($char)
    Switch Asc(StringUpper($char))
        Case Asc("A") To Asc("Z"), Asc("a") To Asc("z")
            Return 1
        Case Else
            Return 0
    EndSwitch
EndFunc   ;==>IsInSet

MsgBox(1, "", IsInSet("ÿ")) ; This seems to return 1 even tho it not even in the set why

Edited September 25, 2014 by Chimp

[jchd]

Beware that by using Asc() instead of AscW() you force a conversion to ANSI. That could silently bite you hard.

[Danp2]

Why are you checking the range of lowercase letters when you have already converted the character to uppercase? Am I missing something?