Documentation for infix ⊅ assembled from the following types:

language documentation Operators

From Operators

(Operators) infix ⊅

multi sub infix:<⊅>($a,$b --> Bool:D)

Not a superset of operator.

Returns True if $a is not a strict superset of $b. Equivalent to !(>).

say (1,2,3) ⊅ (2,3,1); # OUTPUT: «True␤»
say (1,2,3) ⊅ (2,3);   # OUTPUT: «False␤»
say 4 !(>) (1,2,3);    # OUTPUT: «True␤»

⊅ is codepoint U+2285 (NOT A SUPERSET OF).

language documentation Sets, bags, and mixes

From Sets, bags, and mixes

(Sets, bags, and mixes) infix ⊅

Returns True if $a is not a strict superset of $b, else False. More information, Wikipedia definition.