Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Suppose we have two vectors for two adjacent sides of a parallelogram in the form $x\hat{i}+y\hat{j}+z\hat{k}$ Our task is to find the area of parallelogram. The area of parallelogram is magnitude of the cross product of two vectors. (|A × B|)$$\rvert \vec{A}\times\vec{B}\rvert=\sqrt{\lgroup y_{1}*z_{2}-y_{2}*z_{1}\rgroup^{2}+\lgroup x_{1}*z_{2}-x_{2}*z_{1}\rgroup^{2}+\lgroup x_{1}*y_{2}-x_{2}*y_{1}\rgroup^{2}}$$Example Live Demo#include #include using namespace std; float area(float A[], float B[]) { float area = sqrt(pow((A[1] * B[2] - B[1] * A[2]), 2) + pow((A[0] * B[2] - B[0] * A[2]), 2) + pow((A[0] * B[1] - B[0] * A[1]), 2)); return area; } int main() { float A[] = {3, 1, -2}; ... Read More
Consider we have a list of strings. The list has some duplicate strings. We have to check which strings are occurred more than once. Suppose the string list is like [“Hello”, “Kite”, “Hello”, “C++”, “Tom”, “C++”]Here we will use the hashing technique, so create an empty hash table, then traverse each string, and for each string, s is already present in the hash, then display the string, otherwise insert into the hash.Example Live Demo#include #include #include using namespace std; void displayDupliateStrings(vector strings) { unordered_set s; bool hasDuplicate = false; for (int i = 0; i
Here we will see how to get the equal points in a string of brackets. The equal point is the index I, such that the number of opening brackets before it is equal to the number of the closing bracket after it. Suppose a bracket string is like “(()))(()()())))”, if we see closer, we can getSo the number of opening brackets from 0 to 9 is 5, and the number of the closing brackets from 9 to 14 is also 5, so this is the equal point.To solve this problem, we have to follow these few steps −Store the number ... Read More
Suppose we have an array A, it has n elements. Our task is to divide the array A into two subarrays, such that the sum of each subarray will be the same. Suppose the array A = [2, 3, 4, 1, 4, 5], The output is 1, so subarrays before 1 and after 1 are taken. [2, 3, 4], and [4, 5].To solve this problem, we will calculate the whole array except for the first element in right_sum. Consider that is the partitioning element. We will traverse from left to right. Subtracting an element from right_sum and adding an element ... Read More
Consider we have an array A with few elements. We have to find an element from A, such that all elements can be divided by it. Suppose the A is like [15, 21, 69, 33, 3, 72, 81], then the element will be 3, as all numbers can be divisible by 3.To solve this problem, we will take the smallest number in A, then check whether all numbers can be divided by the smallest number or not, if yes, then return the number, otherwise, return false.Example Live Demo#include #include using namespace std; int getNumber(int a[], int n) { int minNumber ... Read More
Suppose we have one 3x3 matrix, whose diagonal elements are empty at first. We have to fill the diagonal such that the sum of a row, column and diagonal will be the same. Suppose a matrix is like −After filling, it will be −Suppose the diagonal elements are x, y, z. The values will be −x = (M[2, 3] + M[3, 2])/ 2z = (M[1, 2] + M[2, 1])/ 2y = (x + z)/2Example Live Demo#include using namespace std; void displayMatrix(int matrix[3][3]) { for (int i = 0; i < 3; i++) { for (int j = 0; j < 3; j++) cout
Here we will see one problem, where we take a number n, we have to find another value say x, such that x + digit sum of x is same as the given number n. Suppose the value of n is 21. This program will return a number x = 15, as 15 + digit sum of 15, i.e. 15 + 1 + 5 = 21 = n.To solve this problem, we have to follow simple approach. We will iterate through 1 to n, in each iteration, we will see if the sum of the number and its digit sum ... Read More
The HTML DOM Track kind property sets/returns the value of kind attribute of track element to specify the type of text track.Following is the syntax −Returning string valuetrackObject.kindSetting kind to stringValuetrackObject.kind = stringValueHere, “stringValue” can be the following −stringValueDetailscaptionsThe captions are translationof dialogue and sound effects (preferable for deaf users)chaptersIt defines the chaptertitles (used for navigating the media resource)descriptionsIt defines a textualdescription of the video content (preferable for blind users)metadataIt is not visible to theuser and content is used by scriptssubtitlesIt is used to displaysubtitles in a videoLet us see an example of Track kind property −Example Live Demo ... Read More
The HTML DOM Track default property sets/returns a boolean value corresponding to whether the track is to enabled until the user’s preference contradicts it.NOTE: Only one track should be default per media (audio/video) element.Following is the syntax −Returning boolean value - true/falsetrackObject.defaultSetting default to booleanValuetrackObject.default = booleanValueHere, “booleanValue” can be the following −booleanValueDetailstrueIt defines that track willbe default enabledfalseIt defines that track willnot be enabled unless user prefers toLet us see an example of Track default property −Example Live Demo Track default form { width:70%; margin: 0 auto; text-align: ... Read More
The HTML DOM TouchEvent Object represents an event which incurs on interaction with the HTML document elements using touch devices.Here, “TouchEvent” can have the following properties and methods −Property/MethodDescriptionaltKeyItreturns a Booleanvalue corresponding to the state if alt key was pressed when atouch event was firedchangedTouchesItreturns aTouchList object corresponding to a list of all contact pointstriggered on a state change of touch eventsctrlKeyItreturns a Booleanvalue corresponding to the state if ctrl was pressed when a touchevent was firedmetaKeyItreturns a Booleanvalue corresponding to the state if meta was pressed when a touchevent was firedshiftKeyItreturns a Booleanvalue corresponding to the state if shift ... Read More