Add 'if IsEmpty then FindSet' patern vs only 'FindSet'

[StefanSosic]

[mexby]

With the "new" continue statement, I think we could go a step further and maybe say "use early exit/continue wherever possible".
In this case, we should only have a single query, and we do want to process its result whenever possible.
Using your example:

internal procedure FindSetWithoutIsEmpty()
var
    Customer: Record Customer;
    i: Integer;
begin
    for i := 1 to 10 do begin
        Customer.SetRange("Country/Region Code", 'RS');
        if not Customer.FindSet() then
           continue;
       // Now we definitely have data we can process
       // ...
    end;
end;

Another example:

internal procedure ProcessDECustomers()
var
    Customer: Record Customer;
begin 
    Customer.SetRange("Country/Region Code", 'DE');
    if not Customer.FindSet() then
        exit;

    repeat
        // Process data here...
    until Customer.Next() = 0;
end;

What do you think?

[KOTRET]

@mexby using early exit like this is horrible for me, but maybe you'd better post this question in the right thread: #253

Related to this PR: maybe it should be more clear that not IsEmpty() + FindSet() is an antipattern, the title of this best practice indicates the opposite.

[JeremyVyska]

This one is well crafted, but maybe we should do a chat sometime and reconcile with the Discussion thread on it?

[finnpedersenkazes]

If an optimization is needed, shouldn't Microsoft simply handle it behind the scenes?