Day 81: Merge Two Objects and Sum Values for Matching Keys | 100 Days of JavaScript Coding Challenge

🎯Welcome to Day 81 of the 100 Days of JavaScript Coding Challenge! 🚀
#CodeWithPoonam #100DaysOfCode
📥 Problem Statement:
Write a JavaScript function that merges two objects where values with the same keys are added together.
📊 Example:
Input:
obj1 = { a: 1, b: 2, c: 3 }
obj2 = { a: 3, b: 4, d: 5 }
Output: { a: 4, b: 6, c: 3, d: 5 }
💡 Approach:
✅ Step 1: Use the spread operator to create a copy of the first object (obj1).
✅ Step 2: Loop through the keys of the second object (obj2).
✅ Step 3: For each key, check if it already exists in the result object.
✅ Step 4: If the key exists, add the value to the existing value; otherwise, add the key-value pair from obj2.
✅ Step 5: Return or print the result object
📚 Key Concepts Used:
✅ Spread Operator (...): Used to create a shallow copy of the first object.
✅ For-in Loop: Loops through the keys of the second object.
✅ Conditional (||): Ensures that if the key does not exist in the result, the value is initialized to 0 before addition.
📅 On Day 81,You learned how to merge two objects while summing the values of matching keys. This is useful when you want to combine data from two sources with common keys.
🔥 Keep up the great work!
📩 #JavaScript #CodingChallenge #100DaysOfCode
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