Raku: removing duplicates (squish vs unique)

Raku is a very fascinating language with a rich and complete set of built-in functions and operators. I just recently discovered squish, a function that aims at removing duplicates in a list or Supply (see the function documentation here ).
Wait, isn’t that the role of unique? Yes, of course, but squish works differently: it removes adiacent repetitions. Allow me to explain with a very simple example:

[3] > my @a = 1,1,2,3,1,4,4,5,5,4;
[1 1 2 3 1 4 4 5 5 4]

[4] > @a.squish;
(1 2 3 1 4 5 4)

[5] > @a.unique;
(1 2 3 4 5)

The output of squish is a list where all equal elements that are repeated one after the other are squashed to a single value, while the output of unique is a single value no matter how many times it appear and in which positions of the list. Therefore, squish acts like a unique on a smaller context, meaning something like “I already gave you this element, skip its repetition until it needs a retransmission”. Raku is amazing!