Array subset check
Detailed guide and Python implementation for the 'Array subset check' problem.
Problem Statement
Write a function is_subset(arr1, arr2) that checks if arr1 is a subset of arr2. Return True if every element of arr1 exists in arr2 (considering duplicates), False otherwise.
- •0 <= len(arr1) <= len(arr2) <= 10^5
- •-10^6 <= elements <= 10^6
Examples
arr1 = [1, 2, 3], arr2 = [1, 2, 3, 4, 5]
True
All elements of arr1 (1, 2, 3) exist in arr2.
arr1 = [1, 2, 6], arr2 = [1, 2, 3, 4, 5]
False
6 is in arr1 but not in arr2.
arr1 = [], arr2 = [1, 2, 3]
True
An empty set is a subset of any set.
Need a Hint?
Edge Cases to Watch
- Empty input structures
- Single element inputs
- Large numerical bounds
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