This page contains automated test results for code from O'Reilly's Ruby Cookbook. If this code looks interesting or useful, you might want to buy the whole book.

Arrays
CodeExpectedActual
a1 = []
 [] [] 
a2 = [1, 2, 3]
 [1, 2, 3] [1, 2, 3] 
a3 = [1, 2, 3, 'a', 'b', 'c', nil]
 [1, 2, 3, "a", "b", "c", nil] [1, 2, 3, "a", "b", "c", nil] 
n1 = 4
n2 = 6
sum_and_difference = [n1, n2, n1+n2, n1-n2]
 [4, 6, 10, -2] [4, 6, 10, -2] 
%w{1 2 3}
 ["1", "2", "3"] ["1", "2", "3"] 
%w{The rat sat
   on the mat}
["The", "rat", "sat", "on", "the", "mat"] ["The", "rat", "sat", "on", "the", "mat"] 
a = [1, 2, 3]
 [1, 2, 3] [1, 2, 3] 
a << 4.0
 [1, 2, 3, 4.0] [1, 2, 3, 4.0] 
a << 'five'
 [1, 2, 3, 4.0, "five"] [1, 2, 3, 4.0, "five"] 
a = [1,2,3]
 [1, 2, 3] [1, 2, 3] 
a << [4, 5, 6]
 [1, 2, 3, [4, 5, 6]] [1, 2, 3, [4, 5, 6]] 
a << a
 [1, 2, 3, [4, 5, 6], [...]] [1, 2, 3, [4, 5, 6], [...]] 
a = [1, 2, 3, [4, 5, 6]]
a.size
 4 4 
a << a
 [1, 2, 3, [4, 5, 6], [...]] [1, 2, 3, [4, 5, 6], [...]] 
a.size
 5 5 
a[0]
 1 1 
a[3]
 [4, 5, 6] [4, 5, 6] 
a[3][0]
 4 4 
a[3].size
 3 3 
a[-2]
 [4, 5, 6] [4, 5, 6] 
a[-1]
 [1, 2, 3, [4, 5, 6], [...]] [1, 2, 3, [4, 5, 6], [...]] 
a[a.size-1]
 [1, 2, 3, [4, 5, 6], [...]] [1, 2, 3, [4, 5, 6], [...]] 
a[-1][-1]
 [1, 2, 3, [4, 5, 6], [...]] [1, 2, 3, [4, 5, 6], [...]] 
a[-1][-1][-1]
 [1, 2, 3, [4, 5, 6], [...]] [1, 2, 3, [4, 5, 6], [...]]