Sha256: 348be33642f1ef470b506b1a929d751f385785e60bbb816641e1a707f115e91b
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Size: 1019 Bytes
Versions: 16
Compression:
Stored size: 1019 Bytes
Contents
# Because the standard Range isn't robust enough to handle floating
# point ranges correctly.
class FixedRange
include Enumerable
attr_reader :step_size, :max, :min
def initialize(min, max, step_size=1)
@step_size = step_size
if (min <=> max) < 0
@min = min
@max = max
else
@min = max
@max = min
end
end
def size
@size ||= calc_size
end
def step(enn=self.step_size, &block)
calc_size(enn).to_i.times do |i|
block.call(step_value(i, enn))
end
end
def each(&block)
step(&block)
end
def step_value(index, step_size=self.step_size)
index = size.to_i + index if index < 0
val = (index * step_size) + self.min
raise ArgumentError, "You have supplied an index and/or step_size that is outside of the range" if
val < self.min or val > self.max
return val
end
alias :[] :step_value
protected
def calc_size(step_size=self.step_size)
((self.max - self.min) / step_size) + 1.0
end
end
Version data entries
16 entries across 16 versions & 1 rubygems