lighttroupe/luz-next

class Integer
    # yields (value, index) 'self' times
    # eg. 11.distribute(0.0..100.0) => (0.0, 0), (10.0, 1), ..., (100.0, 10)
    def distribute(range)
        if self <= 1
            yield range.first, 0
        else
            step = (range.last - range.first) / (self - 1)
            for i in 0...self
                yield range.first + (i * step), i
            end
        end
    end

    def distributed_among(total, range)
        if total <= 1
            yield range.first
        else
            step = (range.last - range.first) / (total - 1)
            yield range.first + (self * step)
        end
    end

    def distribute_exclusive(range)
        if self <= 1
            yield range.first, 0
        else
            step = (range.last - range.first) / (self)
            for i in 0...self
                yield range.first + (i * step), i
            end
        end
    end

    # returns 0...self
    def choose_index_by_fuzzy(fuzzy)
        raise 'value cannot be 0' if self == 0
        return self - 1 if fuzzy == 1.0
        return (self * fuzzy).to_i
    end

    def plural(singular, plural)
        sprintf("%d %s", self, (self == 1) ? singular : plural)
    end
end