Sha256: 95a5360cde5db87e6130cee5330725866974b7eae70501560c27246e1997c275
Contents?: true
Size: 932 Bytes
Versions: 4
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Stored size: 932 Bytes
Contents
module Numbers
private
def sum
monoid(->(a, b) { a + b }, 0)
end
def add(increment)
-> (number) { number + increment }
end
def even
remainder_is(2, 0)
end
def odd
remainder_is(2, 1)
end
def divide(divisor)
->(dividend) { dividend / divisor }
end
def remainder_is(divisor, remainder)
predicate(->(dividend) { remainder(dividend, divisor) == remainder })
end
def remainder(dividend, divisor)
dividend % divisor
end
def range_from(start)
Sequence.new(enumerator_of(increment, start))
end
def range(from, to)
Sequence.new((from..to).lazy)
end
def increment
->(number) { number + 1 }
end
def mod(divisor)
->(number) { number % divisor }
end
def greater_than(right)
predicate(->(left) { left > right })
end
def multiply(y)
monoid(->(x){x * y}, 1)
end
def powers_of(amount)
enumerate(multiply(amount), 1)
end
end
Version data entries
4 entries across 4 versions & 1 rubygems