How hard is LeetCode 709. To Lower Case?

LeetCode 709. To Lower Case is rated Easy on LeetCode.

What topics does LeetCode 709. To Lower Case cover?

LeetCode 709. To Lower Case is tagged String on LeetCode.

To Lower Case — LeetCode 709 Python Solution

EasyString

Problem: #709
Pattern: Hash Map
Reading time: 2 min
Source: leetcode.com

The problem

Given a string s, return the string after replacing every uppercase letter with the same lowercase letter.

Example

Input: s = "Hello"
Output: "hello"

Python solution

Python

class Solution:
    def toLowerCase(self, s: str) -> str:
        return "".join([chr(ord(c) | 32) if c.isupper() else c for c in s])

Complexity

Measure	Complexity
Time	O(n)
Space	O(1) to O(n) auxiliary

Pattern: Hash Map

Trade memory for time: remember what you have seen so the second pass never happens. LeetCode 709. To Lower Case is filed here because the reference solution below belongs to the algorithm family this hub collects, even though its LeetCode tags point elsewhere.

The hash map guide has the Python template for the pattern and the 709 LeetCode problems that use it.

Frequently asked questions

How hard is LeetCode 709. To Lower Case?: LeetCode 709. To Lower Case is rated Easy on LeetCode.
What topics does LeetCode 709. To Lower Case cover?: LeetCode 709. To Lower Case is tagged String on LeetCode.