Coding interviewsbroken down
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Adding to a list
O(n) or O(1)Here are two common methods to add elements to a list:
append()adds the element to the end of the listinsert()takes in a second argument that specifies what position to add the element at
Note
insert() is an O(n) complexity operation whereas append() is an O(1) operation, so use insert() sparingly. If you need to only add to the front, consider using a queue.
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Valid Palindrome
Question
A phrase is a palindrome if it reads the same forward and backward after ignoring all non-alphanumeric characters like punctuation, symbols, capitalization, and spaces.
Write a function which returns true if the given string is a palindrome, and false if it's not.
Input: Han ah!
Output: True
Input: Hugo
Output: False
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