Can't pass data from filter to each

[Stanislav Blinov via Digitalmars-d-learn]

On Monday, 17 April 2017 at 10:02:22 UTC, Suliman wrote:
> New question. Can I put result of filtering in itself without 
> creation of new variables like x:
>
> auto x = 
> MySQLTablesRange.array.filter!(a=>a[0].coerce!string.canFind("_"));

No. filter is simply a wrapper around the source range, it does 
not modify it.

As for the problems you are having with ranges seeming empty, 
they are all due to the fact that the ResultRange in mysql-native 
isn't designed to support such chaining of calls. It's probably 
best to first exhaust a ResultRange and put it into an array.