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Articles on Trending Technologies
Technical articles with clear explanations and examples
Golang Program to update the node value after the Kth node (When K is not in the linked list).
ExamplesUpdate node after k=50 value nodeApproach to solve this problemStep 1 − Define a method that accepts the head of a linked list.Step 2 − If head == nil, return the head.Step 3 − Iterate the given linked list.Step 4 − If node value 10 is not found, return the head without updating any node.Examplepackage main import "fmt" type Node struct { value int next *Node } func NewNode(value int, next *Node) *Node{ var n Node n.value = value n.next = next return &n } func TraverseLinkedList(head *Node){ temp := head for ...
Read MoreHow to truncate character vector with three dots after n characters in R?
To truncate character vector with three dots after n characters can be done with the help of str_trunc function of stringr package. For example, if we have a character vector say x and each value containing 10 characters then truncating those values with three dots after 5 characters can be done by using the command str_trunc(x, 8).Example1> x1 x1Output[1] "rstuvwxyz" "rstuvwxyz" "abcbefgh" "rstuvwxyz" "ijklmnopq" "ijklmnopq" [7] "ijklmnopq" "rstuvwxyz" "rstuvwxyz" "rstuvwxyz" "rstuvwxyz" "abcbefgh" [13] "rstuvwxyz" "abcbefgh" "abcbefgh" "ijklmnopq" "ijklmnopq" "ijklmnopq" [19] "ijklmnopq" "rstuvwxyz" "rstuvwxyz" "abcbefgh" "abcbefgh" "ijklmnopq" [25] "ijklmnopq" "ijklmnopq" "rstuvwxyz" "rstuvwxyz" "rstuvwxyz" "rstuvwxyz" [31] "rstuvwxyz" "abcbefgh" "abcbefgh" "rstuvwxyz" "rstuvwxyz" "abcbefgh" ...
Read MoreHow to assign a column value in a data frame based on another column in another R data frame?
To assign a column value based on another column, we can use ifelse function. The ifelse function checks whether the value in one column of one data frame matches the value in another column of another data frame by using equal sign (==) and then replace the original value with the new column if there is no match else returns the original value. Check out the below example to understand how it can be done.ExampleConsider the below data frame −> x1 x2 df1 df1Output x1 x2 1 3 5 2 3 7 3 0 ...
Read MoreFind number of transformation to make two Matrix Equal in C++
In this problem, we are given two matrices mat1[][] and mat2[][] of the same size. Our task is to find the number of transformations to make two Matrices Equal.The transformation one matrices are −Select any matrix of the two matrices.Select a row or column from the matricesAdd 1 to all elements of the selected row or column.Let’s take an example to understand the problem, Inputmat1[][] = {{1 2} {2 1}} mat1[][] = {{2 3} {4 3}}Output3Explanation1 2 => 2 2 => 2 3 => 2 3 2 1 => 3 1 => 3 2 => 4 3Solution ApproachA simple solution ...
Read MoreFind number of unique triangles among given N triangles in C++
In this problem, we are given three arrays s1[] , s2[] and s3[] of size N, denoting N triangles. Our task is to find the number of unique triangles among given N triangles.For a triangle to be unique, all its side should be unique i.e. no other triangle should have the same sides.Let’s take an example to understand the problem, Inputs1[] = {1, 5, 3} s2[] = {2, 3, 2} s3[] = {4, 2, 5}Output1ExplanationTriangle with sides 1 2 4 is unique.Solution ApproachA simple solution to the problem is by counting the number of triangles which are unique.For this, we ...
Read MoreFind maximum of minimum for every window size in a given array in C++
In this problem, we are given an array arr[] of size n. Our task is to Find the maximum of the minimum for every window size in a given array.Problem Description − We need to find the maximum of the minimum of a window size that varies from 1 to n. For this we will consider subarrays of the given window size, find the minimum element of each subarray and then find the maximum of all the minimums.Let’s take an example to understand the problem, Inputarr[] = {4, 1, 2, 4, 5, 1, 2, 4}Output5 4 2 1 1 1 ...
Read MoreFind numbers with K odd divisors in a given range in C++
In this problem, we are given three integer values, L, R, and k. Our task is to find numbers with K odd divisors in a given range. We will be finding the count of numbers in the range [L, R] that have exactly k divisors.We will be counting the 1 and the number itself as a divisor.Let’s take an example to understand the problem, Inputa = 3, b = 10, k = 3Output2ExplanationNumbers with exactly 3 divisors within the range 3 to 10 are 4 : divisors = 1, 2, 4 9 : divisors = 1, 3, 9Solution ApproachA simple ...
Read MoreFind orientation of a pattern in a matrix in C++
In this problem, we are given a matrix consisting of character values that make a pattern, we are also given a pattern to be found. Our task is to find the orientation (horizontal or vertical) of a pattern in a matrix.Let’s take an example to understand the problem, Inputmat[][] = { { r, a, m }, {a, m, c}, {w, f, t} } Patern : rawOutputverticalSolution ApproachA simple solution to the problem is by searching the M sized pattern in all the N rows of the matrix. This solution is ok but a more effective solution to ...
Read MoreHow to create boxplot with multiple factor levels using ggplot2 in R?
To create a boxplot, we have one factor and one numerical column and the boxplot is created for each category or levels in that factor. Now if we have two factors then the boxplot can be created for both factor levels by passing fill argument in geom_boxplot. This will help us to differentiate between the boxplots for the two factors. Check out the below examples to understand how it works.ExampleConsider the below data frame −> x y grp df dfOutput x y grp 1 Female 0.790349405 b 2 ...
Read MoreFind other two sides and angles of a right angle triangle in C++
In this problem, we are given an integer a denoting one side of a right angle triangle. We need to check whether it is possible to have a right angle triangle with side a. If it is possible, then find the other two sides and angle of a right angle triangle.Let’s take an example to understand the problem, Inputa = 5OutputSides : 5, 12, 13 Angles : 67.38, 22.62, 90ExplanationThe sides of right angle are found as 52 + 122 = 132 And using these sides we can find the angles are, Sin-1 (5/13) and 90 - Sin-1 (5/13).Solution ApproachA ...
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