object problem

Author: devvsakib

L-B/0013 ageSumObject/README.md

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+# 0013 ageSumObject ( L-B )
+
+## Problem
+
+Given an array of objects, return the sum of the age of all the objects.
+
+## Test Cases
+
+- Input: [{name: 'John', age: 20}, {name: 'Jane', age: 30}, {name: 'Jack', age: 40}], Output: 90
+- Input: [{name: 'John', age: 20}, {name: 'Jane', age: 30}], Output: 50
+- Input: [{name: 'John', age: 20}], Output: 20
+
+## Solution
+
+```javascript
+
+const people = [
+    { name: "DevvSakib", age: 20 },
+    { name: "Taulo", age: 15 },
+    { name: "Paulo", age: 22 },
+    { name: "Kaulo", age: 52 },
+    { name: "Yaulo", age: 21 },
+]
+
+const sumAge = people.reduce((ac, cur) => ac + cur.age, 0)
+```
+
+## How it works
+
+- We use the reduce method to iterate through the array and add the age of each object to the accumulator.
+- The reduce method takes two parameters, the first is a callback function and the second is the initial value of the accumulator.
+- The initial value of the accumulator is 0.
+- The reduce method returns the final value of the accumulator.
+- The final value of the accumulator is the sum of the age of all the objects.
+
+## References
+
+- [MDN](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/Reduce)
+- [Wikipedia](https://en.wikipedia.org/wiki/Reduce_(higher-order_function))
+- [GeeksforGeeks](https://www.geeksforgeeks.org/javascript-array-reduce-method/)
+- [JavaScript Info](https://javascript.info/array-methods#reduce-reduceright)
+
+## Problem Added By
+
+- [GitHub](https://www.github.com/devvsakib)
+- [LinkedIn](https://www.linkedin.com/in/devvsakib)
+- [Twitter](https://twitter.com/devvsakib)
+
+## Contributing
+
+Pull requests are welcome. For major changes, please open an issue first to discuss what you would like to change.
+
+Please make sure to update tests as appropriate.

L-B/0013 ageSumObject/ageSum.js

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+const people = [
+    { name: "DevvSakib", age: 20 },
+    { name: "Taulo", age: 15 },
+    { name: "Paulo", age: 22 },
+    { name: "Kaulo", age: 52 },
+    { name: "Yaulo", age: 21 },
+]
+
+const sumAge = people.reduce((ac, cur) => ac + cur.age, 0)