Terminal command equivalent of PHP implode when combining lines

Question

I have a couple of lines and want to group the line into 5 and then implode it for MySQL IN () query.

I have made it out until this

awk          


        

Answer 1

You can do:

awk 'NR%5==0{print s","$0; s=""; next} {if (length(s)>0){ s=s","$0 } else s=$0} END {print s}'

Test it:

$ seq 1 6 | awk 'NR%5==0{print s","$0; s=""; next} {if (length(s)>0){ s=s","$0 } else s=$0} END {print s}'
1,2,3,4,5
6
$ seq 1 12 | awk 'NR%5==0{print s","$0; s=""; next} {if (length(s)>0){ s=s","$0 } else s=$0} END {print s}'
1,2,3,4,5
6,7,8,9,10
11,12