# Introduction

I wrote a function for shell (basically bash) that makes it possible to convert a series of numbers such as “1,5-8,15” into a completely enumerated sequence, so 1 5 6 7 8 15.

I needed this to facilitate passing parameters to another function, but with the ability to give arbitrarily-grouped sets of numbers.

You can see my gist on github.

convert_to_seq() { printf "${@}" | xargs -n1 -d',' | tr '-' ' ' | awk 'NF == 2 { system("/bin/seq "$1" "$2); } NF != 2 { print $1; }' | xargs } convert_to_seq "$1"

Try it out for yourself! If you are looking for such a function, here you go.

# Examples

Input: 1,5,8-10 Output: 1 5 8 9 10 Input: 500-510,37 Output: 500 501 502 503 504 505 506 507 508 509 510 37