On Fri, Apr 18, 2014 at 7:50 AM, Remi Locherer <[email protected]> wrote: > On Fri, Apr 18, 2014 at 04:06:18PM +0200, Ingo Schwarze wrote: >> lilit-aibolit wrote on Fri, Apr 18, 2014 at 03:24:36PM +0300: >> > $ date --date="last month" +%b >> > Mar >> >> Time for a little shell golfing? >> >> Look, i'll play it nice and even add two blanks for readability. >> >> $ date -j +%b $(printf "%02d010000" $(( ($(date +%m)+11)%12 ))) >> Mar > > You don't like January? > > $ date -j +%b $(printf "%02d010000" $(( (01+11)%12 ))) > date: illegal time format > usage: date [-aju] [-d dst] [-r seconds] [-t minutes_west] [-z output_zone] > [+format] [[[[[[cc]yy]mm]dd]HH]MM[.SS]]
Mod arith is fun:: date -j +%b $(printf "%02d010000" $(( ($(date +%m)+10)%12+1 ))) Philip
