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Contents
# coding: utf-8
describe Integer, "#stirling" do
@seq = [
[ 1 ],
[ -1, 1 ],
[ 2, -3, 1 ],
[ -6, 11, -6, 1 ],
[ 24, -50, 35, -10, 1 ],
[ -120, 274, -225, 85, -15, 1 ],
[ 720, -1764, 1624, -735, 175, -21, 1 ],
[-5040, 13068, -13132, 6769, -1960, 322, -28, 1 ],
[40320, -109584, 118124, -67284, 22449, -4536, 546, -36, 1 ],
[-362880, 1026576 ]
]
@seq.to_enum.with_index(1).each do |row, n|
row.to_enum.with_index(1).each do |s, m|
it "returns #{s} as the #{n}#{n.ordinal} Stirling number of the 1st kind (m = #{m})" do
n.stirling(m).should == s
end
end
end
end
Version data entries
5 entries across 5 versions & 1 rubygems