|, &, and ^ create the so-called junctions (formerly known in Perl 6 as quantum superpositions). These objects can be used where a scalar is used but behave differently; unlike the scalars, the junctions have multiple values at the same moment in time.
The |, &, and ^ operators create, respectively, the junctions of the any, all, and one types.
# The value of 4 is one of the listed options say "ok" if 4 == 1|2|3|4|5; # There is no 4 in the list say "ok" if 4 != 1 & 2 & 3 & 5; # 4 repeats twice, thus it is not unique say "ok" unless 4 == 1 ^ 2 ^ 2 ^ 4 ^ 4 ^ 5;
Thanks for this great series!
Is this comment correct?
# There is no 4 in the list
say “ok” if 4 != 1 & 2 & 3 & 5; # ok
Consider:
say “ok” if 4 != 1 & 2 & 3 & 4 & 5; # ok
say “ok” if 4 == 4 & 4 & 4; # ok
say “ok” if 4 == 4 & 4 & 4 & 3; # ()