Redirect to variable

[PePa]

I would like to do something like this, where output gets redirected
into a variable:

some-command >>> variablename1 2>>>variablename2

command-with-many-output-descriptors >>> var1 3>>> var3 4>>> var4

The idea is not needing files to be created but to just use memory. Half
a year ago I posted this idea here, but didn't get any reply, maybe this
isn't the right place? Am I blacklisted??

Anyway, I keep using bash.
Cheers,
Peter