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Python is a popular and user−friendly programming language known for its simplicity and readability. It offers a wide range of libraries and frameworks to meet various development needs, including game development. One such powerful tool is Pygame, which enables the creation of engaging games and multimedia applications. In this article, we will explore the process of building a Brick Breaker game using Python and Pygame. Brick Breaker is a beloved classic arcade game where players control a paddle to strategically bounce a ball and break bricks. By following this tutorial, you will gain a solid understanding of game development in ... Read More
Python, a dynamic programming language, offers an array of possibilities, including game development. Pygame, a widely−used Python library, provides developers with a toolkit for creating 2D games. In this article, we will delve into the process of crafting a classic Pong game utilizing Python and Pygame. Pong, a simplistic yet captivating game, revolves around two paddles and a ball. Competing players aim to score points by propelling the ball past their opponent's paddle. By following the steps outlined in this guide, you will gain insights into setting up the development environment, initializing the game, creating game objects, implementing game logic, ... Read More
In 5.4 PHP version trait is introduced to PHP object-oriented programming. A trait is like class however it is only for grouping methods in a fine-grained and reliable way. It isn't permitted to instantiate a trait on its own. Traits are introduced to PHP 5.4 to overcome the problems of single inheritance. As we know in single inheritance class can only inherit from one other single class. In the case of trait, it enables a developer to reuse sets of methods freely in several independent classes living in different class hierarchies. Example Output Result of addition two numbers:8 ... Read More
Binary Number System is one the type of most popular Number Representation techniques that used in digital systems. In the Binary System, there are only two symbols or possible digit values, i.e., 0 (off) and 1 (on). Represented by any device that only 2 operating states or possible conditions. Generally, there are two types of complement of Binary number: 1's complement and 2’s complement. To get 1’s complement of a binary number, simply invert the given number. For example, 1’s complement of binary number 110010 is 001101. To get 2’s complement of binary number is 1’s complement of given number ... Read More
We can find an element using the attribute class name with Selenium webdriver using the locators - class name, css, or xpath. To identify the element with css, the expression should be tagname[class='value'] and the method to be used is By.cssSelector. To identify the element with xpath, the expression should be //tagname[@class='value']. Then, we have to use the method By.xpath to locate it. To locate an element with a locator class name, we have to use the By.className method. Let us look at the html code of an element with class attribute − Syntax WebElement e = driver. findElement(By.className("input")); ... Read More
ConvolutionConvolution is a mathematical tool for combining two signals to produce a third signal. In other words, the convolution can be defined as a mathematical operation that is used to express the relation between input and output an LTI system.Consider two signals $\mathit{x_{\mathrm{1}}\left( t\right )}$ and $\mathit{x_{\mathrm{2}}\left( t\right )}$. Then, the convolution of these two signals is defined as$$\mathrm{ \mathit{\mathit{y\left(t\right)=x_{\mathrm{1}}\left({t}\right)*x_{\mathrm{2}}\left({t}\right)\mathrm{=}\int_{-\infty }^{\infty }x_{\mathrm{1}}\left(\tau\right)x_{\mathrm{2}}\left(t-\tau\right)\:d\tau=\int_{-\infty }^{\infty }x_{\mathrm{2}}\left(\tau \right)x_{\mathrm{1}}\left(t-\tau\right)\:d\tau }}}$$Properties of ConvolutionContinuous-time convolution has basic and important properties, which are as follows −Commutative Property of Convolution − The commutative property of convolution states that the order in which we convolve two signals does not ... Read More
We are given a graph with a source vertex in the graph. And we have to find the shortest path from the source vertex to all other vertices of the graph. The Dijikstra's algorithm is a greedy algorithm to find the shortest path from the source vertex of the graph to the root node of the graph. Algorithm Step 1 : Create a set shortPath to store vertices that come in the way of the shortest path tree. Step 2 : Initialize all distance values as INFINITE and assign distance values as 0 for source vertex so that it is ... Read More
Problem − Consider the following grammar − E → TE′ E′ → +TE′|ε T′ → FT′ T′ → FT′|ε F → (E)|id Solution − Step1− Elimination of Left Recursion & perform Left Factoring As there is no left recursion in Grammar so, we will proceed as it is. Also, there is no need for Left Factoring. Step2− Computation of FIRST FIRST(E) = FIRST(T) = FIRST(F) = {(, id} FIRST (E′) = {+, ε} FIRST (T′) = {*, ε} Step3− Computation of FOLLOW FOLLOW (E) = FOLLOW(E′) = {), $} FOLLOW (T) = FOLLOW(T′) = {+, ), $} FOLLOW (F) = ... Read More
We can have two ways of creating an xpath – relative and absolute. The absolute xpath has the complete path beginning from the root to the element which we want to identify.An absolute xpath starts with the / symbol. One drawback with the absolute xpath is that if there is any change in attributes beginning from the root to the element, our absolute xpath will become invalid.The relative xpath starts by referring to the element that we want to identify and not from the root node. A relative xpath starts with the // symbol. It is mainly used for automation ... Read More
The & symbol is used as an operator in C++. It is used in 2 different places, one as a bitwise and operator and one as a pointer address of operator.Bitwise ANDThe bitwise AND operator (&) compares each bit of the first operand to that bit of the second operand. If both bits are 1, the bit is set to 1. Otherwise, the bit is set to 0. Both operands to the bitwise AND operator must be of integral types. Example #include using namespace std; int main() { unsigned short a = 0x5555; // pattern 0101 ... unsigned short b = 0xAAAA; // pattern 1010 ... cout