Sha256: 2e41d62f3ba00cb15c1807a367e255841ad59bdb56348ace1eec5adce655869b
Contents?: true
Size: 1.79 KB
Versions: 20
Compression:
Stored size: 1.79 KB
Contents
# coding: utf-8
describe Integer, "#knödel?" do
@seq = {
# A002997
1 => [561,1105,1729,2465,2821,6601,8911,10585,15841,
29341,41041,46657,52633,62745,63973,75361,101101,
115921,126217,162401,172081,188461,252601,278545,
294409,314821,334153,340561,399001,410041,449065,
488881,512461].to_seq,
# A050990
2 => [4,6,8,10,12,14,22,24,26,30,34,38,46,56,58,62,74,
82,86,94,106,118,122,132,134,142,146,158,166,178,
182,194,202,206,214,218,226,254,262,274,278,298,
302,314,326,334,346,358,362,382,386,394,398,422,
446,454,458].to_seq,
# A033553
3 => [9,15,21,33,39,51,57,63,69,87,93,111,123,129,141,
159,177,183,195,201,213,219,237,249,267,291,303,
309,315,321,327,339,381,393,399,411,417,447,453,
471,489,501,519,537,543,573,579,591,597,633,669,
681,687,693].to_seq,
# A050992
4 => [6,8,12,16,20,24,28,40,44,48,52,60,68,76,80,92,
112,116,120,124,148,154,164,172,188,208,212,236,
240,244,264,268,280,284,292,316,332,340,356,364,
388,404,412,428,436,452,508,520,524,548,556,596,
604,628,652].to_seq,
# A050993
5 => [25,65,85,145,165,185,205,265,305,365,445,485,505,
545,565,685,745,785,825,865,905,965,985,1085,1145,
1165,1205,1285,1345,1385,1405,1465,1565,1585,1685,
1745,1765,1865,1925,1945,1985,2005,2045,2105,
2165].to_seq
}
@seq.each do |k, members|
members.first(k+1).each do |n|
it "should return true for #{k}-Knödel number #{n}" do
n.knödel?(k).should be_true
end
end
members.invert.sample(k+1).each do |n|
it "should return false for non-#{k}-Knödel number #{n}" do
n.knödel?(k).should be_false
end
end
end
end
Version data entries
20 entries across 20 versions & 1 rubygems