A little help with Ranges

[Merlin Diavova]

On Friday, 27 August 2021 at 04:01:19 UTC, Ali Çehreli wrote:
> On 8/26/21 7:17 PM, Merlin Diavova wrote:
>
>> [...]
>
> Then the operations downstream will not produce any results. 
> For example, the array will be empty below:
>
> import std.stdio;
> import std.range;
> import std.algorithm;
> import std.string;
> import std.functional;
>
> void main() {
>   auto significantLines = stdin
>                           .byLineCopy
>                           .map!strip
>                           .filter!(not!empty)
>                           .filter!(line => line.front != '#')
>                           .array;
>
>   if (significantLines.empty) {
>     writeln("There were no significant lines.");
>
>   } else {
>     writefln!"The lines: %-(\n%s%)"(significantLines);
>   }
> }
>
> Ali

And there it is!

I was missing

```d
.filter!(not!empty)
```

My code now works exactly how I wanted. Thanks!