What is the best way to refer to itself when obtaining Substring of a literal?

[9il]

On Friday, 24 April 2020 at 22:24:34 UTC, Marcone wrote:
> I don't want to use lambda.
> I don't want create variable.
>
> What is the best way to refer to itself when obtaining 
> Substring withou using lambda and without create variable?
>
>
> example:
>
> writeln("Hello Word!"[x.indexOf(" "), $]);

no way