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############################################################################
#
# File: everycat.icn
#
# Subject: Procedure for generating all concatenations
#
# Author: Ralph E. Griswold
#
# Date: April 25, 1992
#
############################################################################
#
# This file is in the public domain.
#
############################################################################
#
# everycat(x1, x2, ...) generates the concatenation of every string
# from !x1, !x2, ... .
#
# For example, if
#
# first := ["Mary", "Joe", "Sandra"]
# last := ["Smith", "Roberts"]
#
# then
#
# every write(everycat(first, " ", last))
#
# writes
#
# Mary Smith
# Mary Roberts
# Joe Smith
# Joe Roberts
# Sandra Smith
# Sandra Roberts
#
# Note that x1, x2, ... can be any values for which !x1, !x2, ... produce
# strings or values convertible to strings. In particular, in the example
# above, the second argument is a one-character string " ", so that !" "
# generates a single blank.
#
############################################################################
procedure everycat(args[])
local arg
arg := get(args) | fail
if *args = 0 then
suspend !arg
else
suspend !arg || everycat ! args
end
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