either_24¶

Given a list of ints, return true if the list contains a 2 next to a 2 or a 4 next to a 4, but not both.

This exercise was taken from codingbat.com and has been adapted for the Python language. There are many great programming exercises there, but the majority are created for Java.

Test 1¶

Input:

[1, 2, 2]

Output:

True

Test 2¶

Input:

[4, 4, 1]

Output:

True

Test 3¶

Input:

[4, 4, 1, 2, 2]

Output:

False

Test 4¶

Input:

[1, 2, 3, 4]

Output:

False

Test 5¶

Input:

[3, 5, 9]

Output:

False

Test 6¶

Input:

[1, 2, 3, 4, 4]

Output:

True

Test 7¶

Input:

[2, 2, 3, 4]

Output:

True

Test 8¶

Input:

[1, 2, 3, 2, 2, 4]

Output:

True

Test 9¶

Input:

[1, 2, 3, 2, 2, 4, 4]

Output:

False

Test 10¶

Input:

[1, 2]

Output:

False

Test 11¶

Input:

[2, 2]

Output:

True

Test 12¶

Input:

[4, 4]

Output:

True

Test 13¶

Input:

[2]

Output:

False

Test 14¶

Input:

[]

Output:

False