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In this tutorial, we will be discussing a program to understand how to add “graphics.h” C/C++ library to gcc compiler in Linux.To do this we are required to compile and install the libgraph package.This includes install build-essential and some external packages>>sudo apt-get install build-essential >>sudo apt-get install libsdl-image1.2 libsdl-image1.2-dev guile-2.0 guile-2.0-dev libsdl1.2debian libart-2.0-dev libaudiofile-dev libesd0-dev libdirectfb-dev libdirectfb-extra libfreetype6-dev libxext-dev x11proto-xext-dev libfreetype6 libaa1 libaa1-dev libslang2-dev libasound2 libasound2-devThen setting the path in the extracted files>>sudo make install >>sudo cp /usr/local/lib/libgraph.* /usr/libExample#include #include #include int main(){ int gd = DETECT, gm; initgraph(&gd, &gm, NULL); circle(40, 40, 30); delay(40000); ... Read More
To allow multiple file uploads in HTML forms, use the multiple attributes. The multiple attributes work with email and file input types.For limiting maximum items on multiple inputs, use JavaScript. Through this, limit the number of files to be uploaded. For example, let’s say only 2 files to be uploaded at once.You can try to run the following code to learn how to use multiple attributes in HTML. With that, we will limit the number of files uploaded using JavaScript.ExampleLive Demo HTML file upload ... Read More
In this tutorial, we will be discussing a program to understand how vectors work in C/C++.A vector data structure is an enhancement over the standard arrays. Unlike arrays, which have their size fixed when they are defined; vectors can be resized easily according to the requirement of the user.This provides flexibility and reduces the time requirement with arrays to copy the previous elements to the newly created array.Example Live Demo#include #include using namespace std; int main(){ vector myvector{ 1, 2, 3, 5 }; myvector.push_back(8); //not vector becomes 1, 2, 3, 5, 8 for (auto x : myvector) cout
Chrome Extensions eases your work since it provides more features. To download all images on a web page at once, use a Chrome Extension.Download the Image Downloader chrome extension, which is open source. After adding it to Chrome, you can see the following settings −An icon will be visible in the Chrome browser, which is for Image Downloading. Go to the webpage from where you need the images.On reaching the page, click the extension icon as shown below −Click on the images you want to download or select all from the checkbox. After that click Download and that’s it.Here, you ... Read More
In C both Structure and Array are used as container for data types i.e in both structure and array we can store data and also can perform different operations over them.On the basis of internal implementation following are some basic differences between both.Sr. No.KeyStructureArray1DefinitionStructure can be defined as a data structure used as container which can hold variables of different types.On other hand Array is a type of data structure used as container which can hold variables of same type and do not support multiple data type variables.2Memory AllocationMemory allocation for input data in structure does not necessary to be ... Read More
Capturing groups are a way to treat multiple characters as a single unit. They are created by placing the characters to be grouped inside a set of parentheses. For example, the regular expression (dog) creates a single group containing the letters "d", "o", and "g".Capturing groups are numbered by counting their opening parentheses from the left to the right.In the expression ((A)(B(C))), for example, there are four such groups -((A)(B(C)))(A)(B(C))(C)Back references allow repeating a capturing group using a number like \# where # is the groupnumber. See the example below −ExampleLive Demoimport java.util.regex.Matcher; import java.util.regex.Pattern; public class Tester { ... Read More
HTML5 localStorage saves string data in the browser and lasts beyond the current session. localStorage stores the data, with no expiration, whereas sessionStorage is limited to the session only. When the browser is closed, the session is lost.The Local Storage is designed for storage that spans multiple windows and lasts beyond the current session. In particular, Web applications may wish to store megabytes of user data, such as entire user-authored documents or a user's mailbox, on the client side for performance reasons.You can try to run the following code to learn how to work with HTML5 localStorageExampleLive Demo ... Read More
GoJS is a JavaScript library, which you can use to implement interactive diagrams. This page will show you the essentials of using GoJS. If you want to add diagrams and graphs, then use this library, which is Open Source.GoJS has a model-view architecture, in which Models holds arrays of JavaScript objects, which describe nodes and links. To visualize this data using actual Node and Link objects, the Diagrams act as views.Constructing a Diagram with GoJS creates an HTML5 Canvas element to be placed inside the given DIV element.How to draw a diagramStart working with GoJS, you need to declare the ... Read More
The Local Storage is designed for storage that spans multiple windows and lasts beyond the current session. In particular, Web applications may wish to store megabytes of user data, such as entire user-authored documents or a user's mailbox, on the client side for performance reasons.HTML5 localStorage saves string data in the browser and lasts beyond the current session. localStorage stores the data, with no expiration, whereas sessionStorage is limited to the session only. When the browser is closed, the session is lost.The data won’t get deleted when the browser is closed. Here, we will save the name for example.You can ... Read More
As we know that in programming string can be defined as the collection of characters. Now for the requirement of finding how many characters are being used to create a string, C provides two approaches which are strlen() and sizeof().As mentioned in above point both of these methods are used to find out the length of target operand but on the basis of their internal implementation following are some basic differences between both.Sr. No.Keystrlen()sizeof()1Definitionstrlen() is a predefined function defined in a Header file named string.h in C.On other hand sizeof() is a Unary operator and not a predefined function.2Implementationstrlen is ... Read More