Ruby is my best language. Most of my contributions come from an OpenBSD machine. A few of my examples come from a Windows machine with MinGW. I never used Factor, PicoLisp nor AutoHotkey until I found them at Rosetta Code.
#all?
#any?
#chunk
#collect
#collect_concat
#count
#cycle
#detect
#drop
#drop_while
#each_cons
#each_entry
#each_slice
#each_with_index
#each_with_object
#entries
#find
#find_all
#find_index
#first
#flat_map
#grep
#group_by
#include?
#inject
#map
#max
#max_by
#member?
#min
#min_by
#minmax
#minmax_by
#none?
#one?
#partition
#reduce
#reject
#reverse_each
#select
#slice_before
#sort
#sort_by
#take
#take_while
#to_a
#zip