Given a string, return a new string made of every other char starting with the first, so “Hello” yields “Hlo”.
string_bits(‘Hello’) → ‘Hlo’
string_bits(‘Hi’) → ‘H’
string_bits(‘Heeololeo’) → ‘Hello’
Here is my first attempt:
The first priority is getting the code to work, so I came up with the following long solution, which also happened to be the solution provided by CodingBat (I’m glad I’m on the right track!):
def string_bits(str): new_str = "" for i in range(len(str)): if i % 2 == 0: new_str += str[i] return new_str
Obviously, I was not very happy with this solution. It is 5 lines of code within the method and just doesn’t look or feel that great to be honest. In Ruby, I can easily make this into one line of code with the collect or map method! There’s got to be a better Python solution!
Luckily, there is! Here is how I refactored this into one line of code:
def string_bits(str): return ''.join([str[i] for i in range(len(str)) if i % 2 == 0])
Can you think of an alternative one-line solution to this problem? I’d love to see it!