jagged_crow_4350
Arbiter
Top 0.2%
Member Nº 4702
Joined Aug 2026
SQL
Correlated Subquery
Window Deduplication
Multiple WINDOWs
Python
Decorators
Generators
Lambda
Spark
Window Deduplication
Higher-Order Functions
Multiple Windows
Data Modeling
Entities
Learned
Python407
SQL293
Milestones
Top 10
3,637 runs in the past 26 weeksActive days: 14 · Max streak: 6
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Recent solves
Use short-circuit evaluation: given x = 5, print the results of (x > 3 or x > 10), (x > 3 and x < 10
Python · medium · lesson
Simplify boolean expressions
Python · medium · lesson
Use De Morgan's Laws to simplify: not (x > 5 and x < 10) is equivalent to (x <= 5 or x >= 10)
Python · medium · lesson
Apply De Morgan's Laws
Python · medium · lesson
Complete the state machine loop: look up the next state from the transitions dict using the current
Python · medium · lesson
Implement a simple traffic light state machine using a dictionary
Python · medium · lesson
Call the handler function retrieved from the dispatch dictionary.
Python · medium · lesson
Replace an if/elif chain with dict-based dispatch
Python · medium · lesson
Use a dict to classify HTTP status codes: map 200 to 'OK', 301 to 'Redirect', 404 to 'Not Found', 50
Python · medium · lesson
Build a decision table mapping (is_member, total >= 100) tuples to discount percentages
Python · medium · lesson