Merge pull request #24 from devvsakib/devvsakib

L-I problem added

Author: devvsakib

L-I/0005 mostFrequentItem ( L-I )/README.md

@@ -0,0 +1,62 @@
+#  0005 mostFrequentItem ( L-I )
+
+## Problem
+
+Given an array of items, return the most frequent item.
+
+
+## Test Cases
+
+- Input: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10], Output: 1
+- Input: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 1], Output: 1
+- Input: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10], Output: 1
+
+
+## Solution
+
+```javascript
+
+const mostFrequentItem = arr => {
+    const obj = arr.reduce((acc, curr) => {
+        if (acc[curr]) {
+            acc[curr]++
+        } else {
+            acc[curr] = 1
+        }
+        return acc
+    }, {})
+    const max = Math.max(...Object.values(obj))
+    return Object.keys(obj).filter(key => obj[key] === max)
+}
+
+console.log(mostFrequentItem(arr))
+```
+
+
+## How it works
+
+- Create an object with the number of times each item appears in the array
+- Get the maximum value of the object
+- Return the keys of the object that have the maximum value
+
+
+## References
+
+- [Array.prototype.reduce()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/Reduce)
+- [Object.keys()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/keys)
+- [Object.values()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/values)
+- [Math.max()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/max)
+- [Array.prototype.filter()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/filter)
+
+
+## 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-I/0005 mostFrequentItem ( L-I )/mostFrequentItem.js

@@ -0,0 +1,16 @@
+const arr = [1, 2, 3, 4, 5, 6, 7, 8, 9, 1, 2, 3, 4, 5, 1, 2, 3, 1, 2, 1]
+
+const mostFrequentItem = arr => {
+    const obj = arr.reduce((acc, curr) => {
+        if (acc[curr]) {
+            acc[curr]++
+        } else {
+            acc[curr] = 1
+        }
+        return acc
+    }, {})
+    const max = Math.max(...Object.values(obj))
+    return Object.keys(obj).filter(key => obj[key] === max)
+}
+
+console.log(mostFrequentItem(arr))