Updated functions and arrays

build-logic/002_functions.md

@@ -25,6 +25,26 @@
 **Example:**  
 **Input:** `typeOfTriangle(30, 60, 90)` ––> **Output:** `Scalene Triangle`
 
+1. Given an object `obj`, write a function to invert its `key` and `value` for each entries. Inversion will result in value being used as key and key as value.  
+**Note:- There will be no repeated values to maintain the uniqueness.**  
+**Example:**  
+```javascript
+  // Input:
+obj = {
+  "name" : "John",
+  "age" : 51,
+  "hairColor" : "black",
+  "eyes" : "round"
+}
+
+// Output:
+obj = {
+  "John" : "name",
+  "51" : "age",
+  "black" : "hairColor",
+  "round" : "eyes"
+}
+```
 ## Medium
 
 1. Given an array, your function should return the length of the array.  

build-logic/004_strings.md

@@ -45,3 +45,12 @@
 1. Write a program to toggle case of each character of the string "good afternoon" (example: "neogcamp" ⇒ "nEoGcAmP" )
 
 1. Given a string "how was your day?" and a word "how", write a program that removes the occurrence of the specified word from given sentence. ( input: string⇒"programming camp are amazing",word⇒ "programming"; output:" camp are amazing")
+
+1. Given a string `s`, find the first non-repeating character in it and return its index If it does not exist, return `-1`
+    ```javascript
+    Input: s = "neogcamp"
+    Output: 0
+
+    Input: s = "nneeooggccaammpp"
+    Output: -1
+    ``` 

build-logic/005_arrays.md

@@ -15,9 +15,41 @@
 6. Find number of constants and vowels in a string.
 7. Shift an array by X to right.
     - Example [1,2,3,4,5] after shifting to right [5,1,2,3,4]
+8. Given an array of numbers, pick any two numbers `a`  and `b`, we could get the difference by `Math.abs(a - b)`  . Write a function to get the largest difference in the array.
+
+9. Given an array and size k, break the array into chunks of k-length and return them as an array.
+    ```javascript
+    Input: arr = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10], k = 3
+    Output: [[1, 2, 3], [4, 5, 6], [7, 8, 9], [10]]
+    ```
+10. Given an array `nums` with length `n` , return the element which occurred at least `n/2` times in the array.
+    ```javascript
+    Input: nums = [2,2,1,1,1,2,2]
+    Output: 2
+    ```
 
 ## Advanced
 
 1. Find the sum of two matrix.
-1. Display transpose of matrix. Explaination https://www.varsitytutors.com/linear_algebra-help/the-transpose
-1. Find Identity matrix. Explanation https://www.varsitytutors.com/hotmath/hotmath_help/topics/identity-matrix
+2. Display transpose of matrix. Explaination https://www.varsitytutors.com/linear_algebra-help/the-transpose
+3. Find Identity matrix. Explanation https://www.varsitytutors.com/hotmath/hotmath_help/topics/identity-matrix
+
+4. Given an array `arr` with different counts of number we have to find the number with most frequency and return it. 
+If there are two or more numbers with same most frequency the return the biggest number.
+1. Given an array of integers `nums`  and an integer `target`, check if there are two numbers in the array such that they add up to target . Return any one pair that add up to `target`
+    ```javascript
+    Input: nums = [3,7,11,15], target = 18
+    Output: [3,15]
+    Explanation : nus[0] + nums[3] = 18
+    ```
+1. Given an array `arr` with different counts of number we have to find the number with least frequency and return it.   
+If there are two or more numbers with same least frequency the return the biggest number.
+    ```javascript
+    Input: arr = [2, 2, 2, 3, 3, 3, 4, 4, 4, 2, 5, 5, 5, 6, 6]
+    Output: 6
+    ```
+1. Given an integer array `nums`, move all `0's` to the end of it while maintaining the relative order of the non-zero elements.
+   ```javascript
+    Input: nums = [0,2,0,3,12,0]
+    Output: [2,3,12,0,0,0]
+   ```