Amazing how forgiving the older LC engines are...

[Tom Glod]

Yup.....While upgrading from 7 to 8 and from 8 to 9 I had several "I can't
believe this code worked" moments.  I prefer an unforgiving interpreter.

thats why I fell in love with Rust and its ridiculously unforgiving
compiler.  Haven't had to use it yet, but look forward to it.

On Mon, Nov 11, 2019 at 9:01 AM Paul Dupuis via use-livecode <
use-livecode at lists.runrev.com> wrote:

> I just got bit by how forgiving older LC engines version are.
>
> Migrating a stack from LC6.7.11 to LC9.5.1. There is a handle to perform
> a "select all" on a particular list field where "select all" means
> select all lines but the first. The code was essentially:
>
>    put empty into tLineList
>    repeat with i=2 to the number of lines in fld 1
>      put i & cr after tLineList
>    end repeat
>    delete last char of tLineList
>    set the hilitedLines of fld 1 to tLineList'
>
> This throws an script execution error under LC9.0.5 or 9.5.1 when trying
> to execute  the last line, but works perfectly well under LC6.7.11 and
> earlier.
>
> The problem, of course, is that the hilitedLines is supposed to be a
> COMMA delimited list, not a CR delimited list. Even the LC6.7.11
> Dictionary states comma delimited. And yet, LC6.7.11 and earlier happily
> allowed and handled correctly wither comma or cr delimited lists for the
> hilitedLines property.
>
> Simple change of Cr to comma fixes the routine for LC9xx
>
> I am not sure in what more recent LC versions this list flexibility went
> away (7? 8? 9?) but I have mixed feelings that it did go away. On one
> hand, I think the versatility of the older engine in forgiving and
> working with bad syntax was amazing. On the other had, had they been
> stricter, I would have discovered this bug long ago.
>
>
>
>
>
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-- 
Tom Glod
Founder & Developer
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