We’ve updated our Terms of Service. A new AI Addendum clarifies how Stack Overflow utilizes AI interactions.

Return to Revisions

PowerShell Core, 63 bytes

$args|% *l*r|% t*y|?{$_-match'\w'}|group|%{,($_.Name,$_.Count)}

Try it online!

$args|% *l*r # For each string argument, lowercase it
|% t*y # Split it in characters
|?{$_-match'\w'} # Excludes non letters characters
|group # Groups them
|%{,($_.Name,$_.Count)} # build pairs of letters and counts