Day 7: DataWeave Hack: Object Manipulation: mapObject, keysOf, valuesOf (Beginner to Pro) | MuleSoft

Day 7: DataWeave Hack: Object Manipulation: mapObject, keysOf, valuesOf (Beginner to Pro) Today we’re mastering one of the most powerful features of DataWeave: Object Manipulation using mapObject. In this lesson, you’ll learn: 🔹 What $, $$, and $$$ represent in object iteration 🔹 How to modify keys and values 🔹 How to uppercase keys, prefix keys, and clean null values 🔹 How to extract metadata with keysOf() and valuesOf() 🔹 How to count missing or blank fields 🔹 How to rename keys dynamically using a lookup map We walk through multiple real-world examples to help you understand key/value transformations used in APIs, integrations, and data normalization. 📌 Topics Covered: 🔹 mapObject basics 🔹 Renaming keys 🔹 Adding prefixes 🔹 Key transformation rules 🔹 Value modification 🔹 Extracting keys and values 🔹 Handling null/blank fields 🔹 Dynamic key renaming using a lookup map 🎯 Perfect for: MuleSoft beginners, advanced users, integration developers, and anyone learning DataWeave step-by-step. 🎥 Watch the Full Walkthrough I’ve covered this example step-by-step in the YouTube video for today’s lesson: 📌 Watch the whole 30-Day DataWeave Series here: Play list: https://www.youtube.com/playlist?list=PLDaSCeeT7kfZr2ojzYh10nbQIiSMetscs Day 1: https://youtu.be/6_hYxk8k5zk Day 2: https://youtu.be/Q3BGuVrYtmc Day 3: https://youtu.be/Txo22ViU0qw Day 4: https://youtu.be/dQTB9zylRto Day 5: https://youtu.be/IISPEwbpEHg Day 6: https://youtu.be/mgROnBqJ8xI