Sha256: 6ab02d5ff14d52e84bd175653cc57ab6a1214c53c32d673e9a1db35fd2ee722d
Contents?: true
Size: 677 Bytes
Versions: 7
Compression:
Stored size: 677 Bytes
Contents
# coding: utf-8
describe Integer, "#choose" do
# A007318
@seq = [
[1],
[1, 1],
[1, 2, 1],
[1, 3, 3, 1],
[1, 4, 6, 4, 1],
[1, 5, 10, 10, 5, 1],
[1, 6, 15, 20, 15, 6, 1],
[1, 7, 21, 35, 35, 21, 7, 1],
[1, 8, 28, 56, 70, 56, 28, 8, 1],
[1, 9, 36, 84, 126, 126, 84, 36, 9, 1],
[1, 10, 45, 120, 210, 252, 210, 120, 45, 10, 1],
[1, 11, 55, 165, 330, 462, 462, 330, 165, 55, 11, 1]
]
@seq.each_with_index do |row, n|
row.each_with_index do |coeff, k|
it "returns #{coeff} for Binomial(#{n}, #{k})" do
n.choose(k).should == coeff
end
end
end
end
Version data entries
7 entries across 7 versions & 1 rubygems