[thelist] Bitwise Logic Tip [WAS: job (NYC - USA) Contract - .net developer 4month as signment]

Chris at globet.com Chris at globet.com
Fri Jul 29 04:33:34 CDT 2005


> > Insn't this the second time you've spammed the list for your 
> > employment needs? specifically this job?
> Rob:
> I specifically asked the the e-volt website and list managers 
> whether or not it is permissible to post jobs on the list 
> while the web site is being moved.
> I was told it is permissible.

There is a difference between permissible and appropriate. It is
*permissible* for me to harrangue passers-by on Oxford Street through a
bullhorn on the subject of religion - I do not find it *appropriate* to
do so :)

Tips are owed, I would suppose.

<tip type='VBScript'>

After validating an HTML form, multiple errors can be represented by a
single integer using bitwise logic.

Thus if I have 4 form fields to validate, and wish to record which have
valid values:

Dim iErrors : iErrors = 0
Dim iError1 : iError1 = 1 'bit 1
Dim iError2 : iError2 = 2 'bit 2
Dim iError3 : iError3 = 4 'bit 3
Dim iError4 : iError4 = 8 'bit 4

'Validate form, assigning boolean values to
'variables indicating validation success 
'for each of 4 form fields.

If bIsError1 Then iErrors = (iErrors Or iError1)
If bIsError2 Then iErrors = (iErrors Or iError2)
If bIsError3 Then iErrors = (iErrors Or iError3)
If bIsError4 Then iErrors = (iErrors Or iError4)

The integer iErrors can then be sent wherever necessary, and then used

If (iErrors And iError1) = iError1 Then Response.Write "Error 1 has
occurred<br />"
If (iErrors And iError2) = iError2 Then Response.Write "Error 2 has
occurred<br />"
If (iErrors And iError3) = iError3 Then Response.Write "Error 3 has
occurred<br />"
If (iErrors And iError4) = iError4 Then Response.Write "Error 4 has
occurred<br />"


Chris Marsh
Web Developer
Tel: +44 20 8246 4804 Ext 828
Fax: +44 20 8246 4808

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