Server Side Programming Articles - Page 2188 of 2646

Many times we may need to convert the data types of one or more columns in a pandas data frame to accommodate certain needs of calculations. There are some in-built functions or methods available in pandas which can achieve this.Using astype()The astype() method we can impose a new data type to an existing column or all columns of a pandas data frame. In the below example we convert all the existing columns to string data type.Example Live Demoimport pandas as pd #Sample dataframe df = pd.DataFrame({    'DayNo': [1, 2, 3, 4, 5, 6, 7],    'Name': ['Sun', 'Mon', 'Tue', 'Wed', ... Read More

There are a variety of mathematical series which python can handle gracefully. One such series is a series of repeated digits. Here we take a digit and add it to the next number which has two such digits and again the next number is three such digits and so on. Finally, we calculate the sum of all such numbers in the series.ApproachWe take a digit and convert it to string. Then concatenate two such strings to get the double digit number and keep concatenating to get higher numbers of such digits. Then we implement a recursive function to add all ... Read More

Given a string, the program must display the shortest path which will print the string over the screen using that shortest path.Like screen will store alphabets in the formatA B C D E F G H I J K L M N O P Q R S T U V W X Y ZExampleInput: HUP Output : Move Down Move Down Move Down destination reached Move Left Move Left Move Down Move Down Move Down destination reached Move Up destination reachedThe approach used here is to store the characters in the n x n matrix and perform the following operation ... Read More

Given with an array of integer elements, the task is to remove the duplicate values and print the distinct elements in sorted manner.Given below is an array that stores integer type values in the fashion 4, 6, 5, 3, 4, 5, 2, 8, 7 and 0 now, the result will print the sorted elements as 0, 2, 3, 4, 4, 5, 5, 6, 7 and 8 but this result still contains duplicate values 4 and 5 which should be removed and the final result will be 0, 2, 3, 4, 5, 6, 7 and 8ExampleInput: array[] = {4, 6, 5, ... Read More

Given an integer n, the task is to print the numbers who consist only 0’s and 1’s and their sum is equal to the integer n.The numbers which contain only zeros and ones are 1, 10, 11 so we have to print all those numbers which can be added to form the sum equal to n.Like, we entered n = 31 then the answer can be 10+10+11 or 10+10+10+1 theExampleInput: 31 Output:10 10 10 1Algorithmint findNumbers(int n) START STEP 1: DECLARE AND ASSIGN VARAIBALES m = n % 10, a = n STEP 2: LOOP WHILE a>0    IF a/10 ... Read More

Given with number of lines the program must print the symmetric double triangle pattern with least complexity.ExampleInput: 5 Output:  X           X           O X            O X     X O X O X        X O         X O          X           XThe entire problem contains 3 different partitions −Print upper half with n-1 lines for odd n or n-2 lines for even n.Print middle lines, 1 line for odd n or ... Read More

We have to print the data of nodes of the linked list at the given index. Unlike array linked list generally don’t have index so we have to traverse the whole linked list and print the data when we reached a particular.Let’s say, list contains the nodes 29, 34, 43, 56 and 88 and the value of indexes are 1, 2 and 4 than the output will be the nodes at these indexes that are 34, 43 and 88.ExampleLinked list: 29->34->43->56->88 Input: 1 2 4 Output: 34 43 88In above representation of Linked List the yellow highlighted nodes are the ... Read More

We have to print the k number of nodes of the linked list in reverse order. We have to apply the iterative approach to solve this problem.Iterative method is the one which generally uses loops that are executed till the condition holds value 1 or true.Let’s say, list contains the nodes 29, 34, 43, 56 and 88 and the value of k is 2 than the output will be the alternate nodes till k such as 56 and 88.ExampleLinked List: 29->34->43->56->88 Input: 2 Output: 56 88Since we have to remove last k elements from the list the best way to ... Read More

We are given an positive integer n and make a spiral matrix of n x n, with only using O(1) extra space in clockwise directionSpiral matrix is a matrix that works like a spiral which will start from the origin of a circle and rotates in clockwise fashion. So the task is to print the matrix in spiral form using O(1) space starting from 2 → 4 → 6 → 8 → 10 → 12 → 14 → 1 6→ 18.Given below is the example of spiral matrix −ExampleInput: 3 Output:    9 8 7    2 1 6   ... Read More

The task is to print the k nodes starting from the end of the linked list using recursive approach.Recursive approach is the one in which the function call itself again and again till the call is being made and hence stores the result.Let’s say, list contains the nodes 29, 34, 43, 56 and 88 and the value of k is 2 than the output will be the last k nodes such as 56 and 88.ExampleLinked List: 29->34->43->56->88 Input: 2 Output: 88 56As specified the recursive approach should be used which will traverse the list from the end keeping track of ... Read More