+# random numbers
+ $ echo $[${RANDOM}%1000] # random between 0-999
+ $ echo $[${RANDOM}%11+10] # random between 10-20
+ $ echo ${(l:3::0:)${RANDOM}} # N digits long (3 digits)
+
+# reverse a word
+ $ echo "${(j::)${(@Oa)${(s::):-hello}}}"
+
+# Show newest directory
+ $ ls -ld *(/om[1])
+
+# random array element
+ $ FILES=( .../files/* )
+ $ feh $FILES[$RANDOM%$#FILES+1]
+