Practical Data Transformations

This skill covers the data transformations you do every day: working with arrays, reshaping objects, normalizing API responses, grouping data, and safely accessing nested values. Each section shows the imperative approach first, then the functional equivalent, with honest assessments of when each approach shines.

Table of Contents

1. Array Operations
2. Object Transformations
3. Data Normalization
4. Grouping and Aggregation
5. Null-Safe Access
6. Real-World Examples
7. When to Use What

1. Array Operations