On Sat, 2012-02-25 at 17:29 +0900, 夜神 岩男 wrote: > On 02/25/2012 12:43 PM, Patrick O'Callaghan wrote: > > On Fri, 2012-02-24 at 21:22 +0900, 夜神 岩男 wrote: > >> I'm trying to move a script from invoking lots of sed and awk to bash > >> builtins and I'm stumped on something I'm sure is simple. > >> > >> Is there a tr equivalent to the following? > > [...] > > > > You realize that tr is not a Bash builtin, right? > > No, I didn't check, actually, thanks for pointing that out. The tr > command is probably easier for some of the younger folks who will have > to read this later on[1]. Now I'm curious and might run some tests on > the two versions and see which is quicker -- though that's totally not > the point with scripting (well, isn't supposed to be, anyway). > > -IY > > 1. Rantesque continuation: > ...as they seem so allergic to learning one or two sed commands that > they will instead implement a parse/convert library from scratch in > their favorite vanity language complete with intermediate working files > and locks... and viola, new dependencies, attack vectors, opportunities > for frozen jobs, etc are born. Quite. It's a matter of developing a nose for the right combination of tools. In Unix/Linux there's rarely one right answer, but there are many many wrong ones. Good programmers learn good taste :-) Somewhat OT: The other day I came on a nice little problem which at first glance one would think could be solved directly in Bash: Given a string constructed as: <prefix><marker><remainder> Where <marker> is a string matching a (fixed) regular expression and <prefix> is arbitrary but does not match the RE, return only the <prefix>. I convinced myself that the "=~" operator in Bash could handle this, but it made my head spin. I wound up writing 3 lines of Python (no doubt the Perlistas out there could do it in one). It not only worked but it's obviously correct, a property not to be sneezed at. poc -- users mailing list users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines Have a question? Ask away: http://ask.fedoraproject.org
