wrong expresion do while History.Get(j).CharAt(i)<>0

sarkis · Mar 27, 2012

Hi all,
the folowing code doesn' compiled.

do while History.Get(j).CharAt(i)<>"0"
...
loop

where History is a list ,j, i are int

You may say that History.Get(j) is an object, not a string.
If I assign History.Get(j) to a string then use charAt it works.
But
how may I build such expression in one command line?
Any ideas ?
Thanks for answers.

margret · Mar 27, 2012

Try this code:

B4X:

Do While History.Get(j).CharAt(i) & "" <> "0"
...
loop

Jost aus Soest · Mar 27, 2012

In such cases I like to use a VB-like CStr-function:

B4X:

Sub CStr(o As Object) As String
  Return "" & o
End Sub

Than you can modify your code to:

B4X:

Do While CStr(History.Get(j)).CharAt(i) <> "0"
  '...
Loop

BTW: Are you sure, that every object (string) in the list has a minimum length of i?

sarkis · Mar 27, 2012

Thank you for replaying.
I catch your idea.
Here is a solution that I make using your idea.
Do While ("" & History.Get(j)).CharAt(i) <> "0"

wrong expresion do while History.Get(j).CharAt(i)<>0

sarkis

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wrong expresion do while History.Get(j).CharAt(i)<>0

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