Sha256: 5dc8d1f53c17fee4be77e68aed3e6be846e10d4e2734a0e1d536327cae50506c
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Size: 548 Bytes
Versions: 14
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Stored size: 548 Bytes
Contents
class Riak::Client::Decaying
# A float which decays exponentially with time.
attr_accessor :e
attr_accessor :p
# @param[:p] The initial value
# @param[:e] Exponent base
# @param[:r] Timescale
def initialize(opts = {})
@p = opts[:p] || 0
@e = opts[:e] || Math::E
@r = opts[:r] || Math.log(0.5) / 10
@t0 = Time.now
end
# Add d to current value.
def <<(d)
@p = value + d
end
# Return current value
def value
now = Time.now
dt = now - @t0
@t0 = now
@p = @p * (@e ** (@r * dt))
end
end
Version data entries
14 entries across 4 versions & 1 rubygems