Leetcode #2794: Create Object from Two Arrays
In this guide, we solve Leetcode #2794 Create Object from Two Arrays in Python and focus on the core idea that makes the solution efficient.
You will see the intuition, the step-by-step method, and a clean Python implementation you can use in interviews.
Problem Statement
Given two arrays keysArr and valuesArr, return a new object obj. Each key-value pair in obj should come from keysArr[i] and valuesArr[i].
Quick Facts
- Difficulty: Easy
- Premium: Yes
- Tags: JavaScript
Intuition
Each key aligns with the value at the same index, so we can pair them directly.
A single pass over both arrays builds the desired object.
Approach
Zip the two arrays together and insert each pair into a dictionary. Later duplicates overwrite earlier ones, matching object assignment behavior.
Steps:
- Iterate through
zip(keysArr, valuesArr). - Assign
obj[key] = valuefor each pair. - Return the dictionary.
Example
Input: keysArr = ["a", "b", "c"], valuesArr = [1, 2, 3]
Output: {"a": 1, "b": 2, "c": 3}
Explanation: The keys "a", "b", and "c" are paired with the values 1, 2, and 3 respectively.
Python Solution
class Solution:
def createObject(self, keysArr: List[str], valuesArr: List[int]) -> dict:
obj = {}
for k, v in zip(keysArr, valuesArr):
obj[k] = v
return obj
Complexity
The time complexity is , and the space complexity is .
Edge Cases and Pitfalls
Watch for boundary values, empty inputs, and duplicate values where applicable. If the problem involves ordering or constraints, confirm the invariant is preserved at every step.
Summary
This Python solution focuses on the essential structure of the problem and keeps the implementation interview-friendly while meeting the constraints.