Sha256: e8f1600fb31d362d5fa54451f040e4e1e5e74bd169b5832c3c87e9b46f53bc27
Contents?: true
Size: 774 Bytes
Versions: 5
Compression:
Stored size: 774 Bytes
Contents
# coding: utf-8
# A000651
TAKEUCHI = [0, 1, 4, 14, 53, 223, 1034, 5221, 28437, 165859, 1029803, 6772850,
46983238, 342509396, 2615606677, 20865444825, 173446634597,
1499111445237, 13445550920288, 124919896067530,
1200320663197275, 11910845573790488]
describe Integer, "#takeuchi" do
TAKEUCHI.each_with_index do |t, n|
it "returns #{t} as the #{n}#{n.ordinal} Takeuchi number" do
n.takeuchi.should == t
end
end
end
describe Integer, "#takeuchi?" do
TAKEUCHI.each do |n|
it "returns true for Takeuchi number #{n}" do
n.should be_takeuchi
end
end
TAKEUCHI.to_seq.invert.sample(100).each do |n|
it "returns false for non-Takeuchi number #{n}" do
n.should_not be_takeuchi
end
end
end
Version data entries
5 entries across 5 versions & 1 rubygems