List Comprehension Master

Problem Statement

Use list comprehensions to transform data efficiently.

Background

List comprehensions provide a concise way to create lists:

[expression for item in iterable if condition]

Your Task

Write a function transform_list(numbers) that returns a dictionary with various transformations.

Output Format

Return a dictionary with:

• "squared": Each number squared
• "evens": Only even numbers
• "positive": Only positive numbers
• "doubled_evens": Even numbers doubled
• "abs_values": Absolute value of each number