Sha256: bab7e4a55a73ef3109a476b211dd154c7c691994857cb2a965d7150ee7de5543
Contents?: true
Size: 663 Bytes
Versions: 36
Compression:
Stored size: 663 Bytes
Contents
describe Integer, "#self_descriptive?" do
SELF_DESCRIPTIVE = [nil,nil,nil,nil,1210,21200,nil,
3211000,42101000,521001000,6210001000]
SELF_DESCRIPTIVE.each_with_index do |number, base|
next if number.nil?
it "returns true if the number is self-descriptive in base #{base}" do
number.self_descriptive?(base).should be_true
end
end
[21,101,2345,26871,112200,1723492,
66287620,112276826,2386520171].each do |number|
base = number.digits.size
it "returns false if the number isn't self-descriptive in base #{base}" do
number.to_s(base).to_i.self_descriptive?(base).should be_false
end
end
end
Version data entries
36 entries across 36 versions & 1 rubygems