askinss · March 27, 2014 15:58
diff --git a/yesterdate-linux.sh b/yesterdate-linux.sh
 > date -d-1day
 Mon Sep  6 09:08:43 CEST 2010
 > date -d-1day +%Y%m
 201009
diff --git a/yesterdate-osx.sh b/yesterdate-osx.sh
 > date -v-1d
 ma  6 sep 2010 09:10:00 CEST
 > date -v-1d +%Y%m
 201009
diff --git a/yesterdate.rb b/yesterdate.rb
 require 'date'

 puts (Date.today-1).strftime("%Y%m")