@@ -159,5 +159,54 @@ console.log("Longest Substring: ", longestSubstring(str2));
159159console . log ( "-------------------------------------------------" ) ;
160160console . log ( "Activity 4: " ) ;
161161
162+ // Task 8: Write a function to rotate an array by k positions. Log the rotated array.
163+ 164+ const rotateArray = ( arr , k ) => {
165+ k = k % arr . length ;
166+ let result = [ ] ;
167+ for ( let i = 0 ; i < arr . length ; i ++ ) {
168+ result . push ( arr [ ( i + k ) % arr . length ] ) ;
169+ }
170+ return result ;
171+ }
172+ 173+ let arr6 = [ 4 , 2 , 9 , 5 , 1 , 3 , 6 , 8 , 7 ] ;
174+ let k = 3 ;
175+ console . log ( "Rotate Array: " , rotateArray ( arr6 , k ) ) ;
176+ 177+ // Task 9: Write a function to merge two sorted arrays into one sorted array. Log the merged array.
178+ 179+ const mergeArrays = ( arr1 , arr2 ) => {
180+ let result = [ ] ;
181+ let i = 0 ;
182+ let j = 0 ;
183+ 184+ while ( i < arr1 . length && j < arr2 . length ) {
185+ if ( arr1 [ i ] < arr2 [ j ] ) {
186+ result . push ( arr1 [ i ] ) ;
187+ i ++ ;
188+ } else {
189+ result . push ( arr2 [ j ] ) ;
190+ j ++ ;
191+ }
192+ }
193+ 194+ while ( i < arr1 . length ) {
195+ result . push ( arr1 [ i ] ) ;
196+ i ++ ;
197+ }
198+ 199+ while ( j < arr2 . length ) {
200+ result . push ( arr2 [ j ] ) ;
201+ j ++ ;
202+ }
203+ 204+ return result ;
205+ }
206+ 207+ let arr7 = [ 1 , 3 , 5 , 7 ] ;
208+ let arr8 = [ 2 , 4 , 6 , 8 ] ;
209+ console . log ( "Merge Arrays: " , mergeArrays ( arr7 , arr8 ) ) ;
210+ 162211console . log ( "-------------------------------------------------" ) ;
163212console . log ( "Activity 5: " ) ;
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