TRY:
Often I find that I have to do multiple actions on a non-object variable, for
instance I might be working with a large string where I need to replace
multiple sub-strings, sometimes on a conditional basis. For example, suppose I
have a string S which is a pattern and contains something like "aaa bbb ccc
eee". (Note1 : this is NOT a Subst pattern string!)
Currently I need to write a lot of code like:
wkS=IIf(somecondition, Replace$(S,"aaa","Somebody"),"")
wks=IIf(someothercondition, Replace$(wkS,"bbb","something","else")
...
If instr(wkS,"ddd")>0 then Replace$(wkS,"ddd","Tuesday fortnight)
...
etc
Would it be possible to provide within gambas a "shortcut" method for such
whereby I could write
wkS=S
With wkS
IIf(somecondition, Replace$("aaa","Somebody","")
...
etc
End With
where wkS is a String variable, i.e. not an object.
It's just an idea, I was wondering if it is possible. I have written quite a
lot of sed calls to achieve the things I need to do but they are a royal PITA
to develop in the first place and an extremely royal PITA to maintain.
CATCH:
Another example might illuminate further. Again I'll talk about string
variables as they are easiest to convey the idea.
Since 3.5 I can do the following sorts of things:
Dim MyWeather As String ="Tuesday -32C"
Dim MyWeatherComment As String[] = Scan(MyWeather, "* *C")
With MyWeatherComment
.[0]=Replace( .[0], "Tuesday", "Tomorrow the maximum temp will be" )
.[1]=IIf ( Val ( .[1] ) < 19, .[1] & " Brrrrr!", .[1] & " Phew!")
etc
End With
Print MySArray.Join(" ")
which results in "Tomorrow the maximum temp will be -32 Brrrrr!"
What I would like to do is
Dim MyWeather As String = "Tuesday 1st August 2014. Exp Max:-32C Hum:2%"
Dim MyComment As String="Today the maximum temp will be &1 &2"
With Scan(MyWeather,"* *. Exp Max:*C *)[2]
Print Subst(MyComment, ., IIf( Val(.)<19,"Brrr!", "Phew")
End With
FINALLY:
In the above pretend code of mine it might be hard to see but on that Print
line I'm just using dot, (.) to represent the current With target. I don't
know how the compiler works with WITH but given the above array constructs we
now have, it looks like it expands:
WITH <target>
.something .... .something .....
END WITH
to:
WITH <target>
<target>.something .... <target>.something .....
END WITH
So what I am asking for is an extension such that "." (i.e. " . ") means the
current WITH target in any context, or in other words it refers to the WITH
target regardless of whether that target is an object or a native datatype. So
a lone . would refer to the WITH target itself.
regards
Bruce
--
B Bruen <bbr...@paddys-hill.net>
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