Linux: ps output fomat

It took for me some time to find the solution, because "ps --help" doesn't print the full information especially about output format. I often need to obtain some process ID from script, based on command name and its arguments.

The first solution is to parse "ps -aux". But it's not convenient because pid is not the first column. I found command in the man page:
$ ps -eo pid,comm,args
It allows one to define certain columns. Possible keys are:
pcpu; group; ppid; user; args; comm; rgroup; nice; pid; pgid; etime; ruser; time; tty; vsz