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Articles on Trending Technologies
Technical articles with clear explanations and examples
C++ Programming Internals?
C++ Internals means how the working of C++ compiler compiling the .cpp code and giving us the output. C++ is a popular programming language mostly used for writing system software. It is an extension of the C programming language. C is a compiled language. The C++ compiler compiles C++ code to an object or executable file is generated. The executable or the binary files contains machine executable instructions and some metadata of the machine instructions.A typical way of compiling a C++ program is to run the compiler on C++ code. The compiler will generate machine instructions which are set of ...
Read MoreArea of a triangle inscribed in a rectangle which is inscribed in an ellipse?
For understanding this complex problem, let's do it in two parts. First we will find the dimensions of the rectangle and based on that we can find the area of a triangle inscribed in it.Using the equation of ellipse and differential calculus, mathematical formula for the area of a rectangle is, area = 2ab, where 2a = major axis and 2b = minor axis.The largest triangle that can be inscribed in the rectangle, should stand on the same base & has height raising between the same parallel sides of the rectangle.The area of largest triangle inscribed within the rectangle is ...
Read MorePrint pyramid of tutorialspoint in PL/SQL
PL/SQL stands for “Procedural Language extension to SQL” . It is the mixture of SQL and Procedural features provided by programming language. It was developed by Oracle Corporation in the late 1980s as procedural extension language for SQL and the Oracle relational database.PL/SQL programs consists of blocks that can be nested and a block structure look likes this −DECLARE -- it contains declaration statements BEGIN -- It contains executable statements EXCEPTIONS -- It contains exception handling statements END;ExampleIn PL/SQL single-line comments begin with double hyphen(--) and Multi-line comments begin with a slash-asterisk ( /* ) and end ...
Read MoreC++ Programming for Smallest K digit number divisible by X?
Smallest K digit number that divisible by X is found using the formula by checking divisible by X. The formula works in the following way −Compute minimum K digit number [min] for example: 10/100/1000 etc.Now find if min is divisible by X. if yes, then this is the answer.If not, then min+X - ([min+X]%k) is the answer.Example#include #include using namespace std; int main() { int X = 83; int K = 5; cout
Read MoreDisable Orientation Change in iOS
There are numerous application which either runs on Portrait mode or in Landscape mode.Restricting the application in one of the mode is important to achieve this.In this post we will see how to restrict the orientation or disable the orientation to one mode.If you want the application to be running only in Portrait mode, Below your viewDidLoad method copy the below line of codeoverride var supportedInterfaceOrientations: UIInterfaceOrientationMask { get { return .portrait } }This will lock the landscape mode for your application. Similarly by replacing .portrait to .landscape will run your application in landscape mode.If ...
Read MoreHow to get current date and time from internet in iOS?
Working with date and time can be tricky, I’ve seen new programmers struggling with date and time. In almost all the application you will be required to get the date and multiple operations are dependent on it.Here we will be seeing how to get the current date and time in swift.In this post we will be seeing how to get the current time and UTC time.For getting the UTC time, paste below code in playground.let utcDate = Date() print(utcDate)If you wish to get the time stamp of your location, paste the below code in playground.let dateObj = Date() let datetformatter ...
Read MoreHow to get the differences between two dates in iOS?
Getting difference between two dates is easy. You should know how to play between the dates.We will be using DateFormatter class for formatting the dates.Instances of DateFormatter create string representations of NSDate objects, and convert textual representations of dates and times into NSDate objects.You can read more about it here https://developer.apple.com/documentation/foundation/dateformatterWe will also be using Calendar structure, apple has provided beautiful documentation of it, https://developer.apple.com/documentation/foundation/calendarSo let’s get started.Open Xcode, New Playground.Copy the below codeimport UIKit // create object of DateFormatter and Calendar let formatter = DateFormatter() let calendar = Calendar.current // specify the format, formatter.dateFormat = "dd-MM-yyyy" // specify the start ...
Read MoreHow to use both front and back cameras simultaneously in iOS?
As of now, there’s no way you can access both front and back cameras simultaneously. As both cameras have different session, as soon as one will start other session will die.As per the apple developer forum answered by Apple support team −“Apps cannot capture from the front and back cameras simultaneously. You can switch from one to the other (with a short delay between) but not both at the same time”
Read MoreHow do I create a TableView with rounded corners in iOS?
Table View is one of the most important and fundamental part of iOS application, Every iOS developer should be familiar with it.Almost every application you see in App store use table view.Table views on iOS display a single column of vertically scrolling content, divided into rows. Each row in the table contains one piece of your app’s content. For example, the Contacts app displays the name of each contact in a separate row, and the main page of the Settings app displays the available groups of settingsYou can read more about table view here, https://developer.apple.com/documentation/uikit/uitableviewIn this post we will see ...
Read MoreHow to detect user pressing HOME key in iOS?
It is very important to know when user is pressing home key as it puts the application to background, here we will be seeing how to identify or get a call when user presses home key.In you AppDelegate.swift, there are delegates methods.Open your AppDelegate.swift and in applicationWillResignActive(_ application: UIApplication) and applicationDidEnterBackground(_ application: UIApplication), write print statement and put a breakpoint as shown.Run the application, once the app is launch tap the home button, applicationWillResignActive will be called and then applicationDidEnterBackground.
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