That's part of why people avoid perl. It's very capable, but that wide scope is counter to the unix philosophy that prefers simple, focused utilities that can be combined in pipelines.

you could ask why have sub/gsub when there is sed... that's because you need that for specific field or string in addition to other processing.. similarly, having tr for specific string/field is useful..

I meant join as in perl's join - to construct a string out of array values with specified separator

Some examples:

* https://stackoverflow.com/questions/48920626/sort-rows-in-cs...

* https://stackoverflow.com/questions/45571828/execute-bash-co...

* https://stackoverflow.com/questions/48925359/sorting-groups-...