`sort -n` in APL

session.sh

# `sort -n` will treat as many leading characters as digits as it can and it will do a numeric sort with whatever it was 
# able to treat as a number
#
# e.g.

$ echo -e '123 file.txt\n65 exit.c\n465 words.rtf' 
123 file.txt
65 exit.c
465 words.rtf
$ echo -e '123 file.txt\n65 exit.c\n465 words.rtf' | sort -n
65 exit.c
123 file.txt
465 words.rtf


# here is an attempt to do something similar in Dyalog APL
#########################
        (⊂⍋m)⌷m←↑'0' '1' '2' '3' '4' '5' '6' '7' '8' '9'∘{leadingNumber←⍵/⍨mask←∧\⍺∊⍨⍵ ⋄ (⍎leadingNumber) (⍵/⍨~mask)}¨'123 file.txt'  '65 exit.c' '465 words.rtf' 
┌───┬──────────┐
│65 │ exit.c   │
├───┼──────────┤
│123│ file.txt │
├───┼──────────┤
│465│ words.rtf│
└───┴──────────┘