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boolean
#boolean puts true puts false puts "!"#not "!" puts !true puts !false puts false && false puts false && true puts true && true
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IS_IP?
piramid
piramid2
faktorial
variables output
3.4.0 / 3.5.2 / 3.5.1 / 3.6.1 / 3.6.5.#
Hash and Symbols
Division Function without / or * signs
ruby LRU cache with constant get/set
Ruby
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