solid_wren_4020
Warden
Top 7.8%
Member Nº 1687
Joined Jun 2026
SQL
Storage Optimization
Window Partitioning
Scalar Subquery
Python
Generators
Copying Lists
Nested Dicts
Spark
Window Deduplication
Higher-Order Functions
Exploding Arrays
Data Modeling
Self-Referential
Many-to-Many
One-to-One
Solved
SQL3
Python0
Milestones
Hire verdict
831 runs in the past 26 weeksActive days: 10 · Max streak: 6
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Recent solves
Use a ternary expression to compute abs_n: n if non-negative, else -n.
Python · medium · lesson
Given the list 'values', loop through each and print "T" if the value is truthy or "F" if it is fals
Python · medium · lesson
Use 'and' as a guard: 'data and data.upper()' safely skips .upper() when data is None
Python · medium · lesson
Use the 'or' operator to provide default values
Python · medium · lesson
Given the list nums, use extended unpacking to capture the first element in 'first', the last elemen
Python · medium · lesson
Use multiple assignment to set x to 10 and y to 20 on one line
Python · medium · lesson
Use a dictionary comprehension to map each word in the list ['hello', 'world', 'python'] to its leng
Python · medium · lesson
Use a list comprehension to create a list of squares of the even numbers from 0 to 9 (inclusive)
Python · medium · lesson
Filter out zeros, then sort by absolute value
Python · medium · lesson
Given items = ['a', 'b', 'c', 'd', 'e'], implement an O(n) single-pass that builds a reverse list wi
Python · medium · lesson