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# MIT License, Copyright (c) 2024 Marvin Borner
:input std/Set
:import std/Number T
# adds a number of a set
add T.<?>add ⧗ Number → NumberSet → NumberSet
# returns true if a number is in a set
has? T.<?>has? ⧗ Number → NumberSet → Boolean
:test (has? (+5) (add (+5) empty)) ([[1]])
:test (has? (+5) empty) ([[0]])
# converts a list to a set
list→set T.<?>list→set ⧗ (List Number) → NumberSet
:test (has? (+0) (list→set ((+5) : ((+3) : ((+2) : ((+1) : {}(+0))))))) ([[1]])
:test (has? (+5) (list→set ((+5) : ((+3) : ((+2) : ((+1) : {}(+0))))))) ([[1]])
:test (has? (+6) (list→set ((+5) : ((+3) : ((+2) : ((+1) : {}(+0))))))) ([[0]])
:test (has? (+7) (list→set ((+5) : ((+7) : {}(+1))))) ([[1]])
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