Ones and Zeros Python Codewars

 

Given an array of ones and zeroes, convert the equivalent binary value to an integer.

Eg: [0, 0, 0, 1] is treated as 0001 which is the binary representation of 1.

Examples:

Testing: [0, 0, 0, 1] ==> 1
Testing: [0, 0, 1, 0] ==> 2
Testing: [0, 1, 0, 1] ==> 5
Testing: [1, 0, 0, 1] ==> 9
Testing: [0, 0, 1, 0] ==> 2
Testing: [0, 1, 1, 0] ==> 6
Testing: [1, 1, 1, 1] ==> 15
Testing: [1, 0, 1, 1] ==> 11

However, the arrays can have varying lengths, not just limited to 4.

 

def binary_array_to_number(arr):
    return int(''.join([str(item) for item in arr]), 2)

def binary_array_to_number(arr):
    s = 0
    for digit in arr:
        s = s * 2 + digit

    return s
print(binary_array_to_number([0,0,0,1]))

Training on Ones and Zeros | Codewars

Related Posts