Efficiently sorting a numpy array in descending order?
ML System Design practice on Codemia
Design recommenders, ranking systems and training pipelines the way ML interviews actually ask for them, with worked solutions.
Goal: Efficiently sorting a numpy array in descending order
Direct Answer
Implement the smallest working solution first, verify behavior, then harden edge cases.
Recommended Workflow
- Reproduce the requirement or issue in a minimal setup.
- Confirm environment assumptions (version, config, permissions, and runtime context).
- Apply the smallest targeted implementation change.
- Re-validate with a representative real-world input.
Concrete Example
Validation Checklist
- Expected output is produced for the primary scenario.
- Edge cases are handled explicitly.
- The change is reproducible in your target environment.
Common Pitfalls
- Using implicit behavior for missing keys/values.
- Interpreter and package environment mismatch.
- Catching exceptions without actionable handling.
Summary
Make the baseline behavior correct and observable first; optimize only after correctness is proven. Tags: Python, NumPy, sorting algorithms, descending order, data manipulation.
Related reading
- Elegant way to find closest value in a vector from above
- Encoding labels for multi-class problems in sckit-learn
- enet works but not when run via carettrain
- Enforce pad_sequence to a certain length
- Election Algorithms - A ring algorithm
- Elegant Python code for Integer Partitioning
- Elegant Python function to convert CamelCase to snake_case?
- Elegant ways to support equivalence equality in Python classes

DSA Fundamentals
Master algorithmic patterns and data structures through hands-on LeetCode-style problems - from arrays and hashing to dynamic programming and advanced graphs.
View the courseTrack what you have practised
A free account saves your progress, solutions and study plan across every problem on Codemia.
ML System Design practice on Codemia
Design recommenders, ranking systems and training pipelines the way ML interviews actually ask for them, with worked solutions.