Tutorial by Examples: ce

Access Modifier to which CLS rules apply

using System; [assembly:CLSCompliant(true)] namespace CLSDoc { public class Cat { internal UInt16 _age = 0; private UInt16 _daysTillVacination = 0; //Warning CS3003 Type of 'Cat.DaysTillVacination' is not CLS-compliant protected UInt16 DaysT...

C# Language • CLSCompliantAttribute

Finding the Shortest Path from Source to other Nodes

Breadth-first-search (BFS) is an algorithm for traversing or searching tree or graph data structures. It starts at the tree root (or some arbitrary node of a graph, sometimes referred to as a 'search key') and explores the neighbor nodes first, before moving to the next level neighbors. BFS was inve...

algorithm • Breadth-First Search

Finding Shortest Path from Source in a 2D graph

Most of the time, we'll need to find out the shortest path from single source to all other nodes or a specific node in a 2D graph. Say for example: we want to find out how many moves are required for a knight to reach a certain square in a chessboard, or we have an array where some cells are blocked...

algorithm • Breadth-First Search

Force a Test Crash With Fabric

Add a button you can tap to trigger a crash. Paste this code into your layout where you’d like the button to appear. <Button android:layout_height="wrap_content" android:layout_width="wrap_content" android:text="Force Crash!" android:onClick=&quo...

Android • Crash Reporting Tools

Objective C code to convert HTML string to NSAttributedString and Vice Versa

HTML to NSAttributedString conversion Code :- //HTML String NSString *htmlString=[[NSString alloc]initWithFormat:@"<!DOCTYPE html><html><body><h1>My First Heading</h1><p>My first paragraph.</p></body></html>"]; //Converting HTML s...

iOS • Convert HTML to NSAttributed string and vice verse

Class, Interface, Record usage

// Record type Ribbon = {Length:int} // Class type Line(len:int) = member x.Length = len type IHaveALength = abstract Length:int let inline getLength s = (^a: (member Length: _) s) let ribbon = {Length=1} let line = Line(3) let someLengthImplementer = { new IHaveALength wit...

F# • Statically Resolved Type Parameters

Setting place type filters for PlaceAutocomplete

In some scenarios, we might want to narrow down the results being shown by PlaceAutocomplete to a specific country or maybe to show only Regions. This can be achieved by setting an AutocompleteFilter on the intent. For example, if I want to look only for places of type REGION and only belonging to I...

Android • Android Places API

Replace Algrorithms

boost::replace_all(): #include <iostream> #include <string> #include <boost/algorithm/string.hpp> using namespace std; int main() { // String to replace characters in string str = "Darn you, Darn you to the 5th power!!!"; // Replace "Da...

boost • boost String Algorithms Library

Catching exception with try-catch-finally

Catching exceptions in Kotlin looks very similar to Java try { doSomething() } catch(e: MyException) { handle(e) } finally { cleanup() } You can also catch multiple exceptions try { doSomething() } catch(e: FileSystemException) { handle(e) } catch(e: Network...

Kotlin • Exceptions

Accessing Google Analytics APIs

You can technically access the Google Analytics APIs using any programing language that can handle a HTTP Post or HTTP Get request. That being said, Google has also created a number of official standard client libraries to help you with this. Using a standard client library for your chosen programm...

google-analytics-api • Getting started with google-analytics-api

Debugging Ruby on Rails Quickly + Beginner advice

Debugging by raising exceptions is far easier than squinting through print log statements, and for most bugs, its generally much faster than opening up an irb debugger like pry or byebug. Those tools should not be your first step. Debugging Ruby/Rails Quickly: 1. Fast Method: Raise an Exceptio...

Ruby on Rails • Debugging

Identifying the Device and Operating

UIDevice *deviceInfo = [UIDevice currentDevice]; NSLog(@"Device Name %@", deviceInfo.name); //Ex: myIphone6s NSLog(@"System Name %@", deviceInfo.systemName); //Device Name iPhone OS NSLog(@"System Version %@", deviceInfo.systemVersion); //System Version 9.3...

iOS • UIDevice

Getting the Device Orientation

UIDevice *deviceInfo = [UIDevice currentDevice]; int d = deviceInfo.orientation; deviceInfo.orientation returns an UIDeviceOrientation value which is shown as below: UIDeviceOrientationUnknown 0 UIDeviceOrientationPortrait 1 UIDeviceOrientationPortraitUpsideDown 2 UIDeviceOrientationLandscap...

iOS • UIDevice

Getting the Device Battery State

//Get permission for Battery Monitoring [[UIDevice currentDevice] setBatteryMonitoringEnabled:YES]; UIDevice *myDevice = [UIDevice currentDevice]; [myDevice setBatteryMonitoringEnabled:YES]; double batLeft = (float)[myDevice batteryLevel] * 100; NSLog(@"%.f",batLeft); int d = myD...

iOS • UIDevice

Convert string to ubyte[] and vice versa

String to immutable ubyte[] string s = "unogatto"; immutable(ubyte[]) ustr = cast(immutable(ubyte)[])s; assert(typeof(ustr).stringof == "immutable(ubyte[])"); assert(ustr.length == 8); assert(ustr[0] == 0x75); //u assert(ustr[1] == 0x6e); //n assert(ustr[2] == 0x6f); //o...

D Language • Strings

Execute job once at specific time

Note: at is not installed by default on most of modern distributions. To execute a job once at some other time than now, in this example 5pm, you can use echo "somecommand &" | at 5pm If you want to catch the output, you can do that in the usual way: echo "somecommand > o...

Bash • Jobs at specific times

Face and Feature Detection

Objective-C Import the following to your ViewController #import <CoreImage/CoreImage.h> #import <CoreImage/CoreImage.h> #import <QuartzCore/QuartzCore.h> Call the function [self faceDetector]; Function definition: -(void)faceDetector { // Load the picture for face...

iOS • Face Detection Using CoreImage/OpenCV

Listing Instances in an Easy to Read Way

Instances have a lot of metadata that gets returned from a call to describe-instances, but often times you just want to see the basics. You can use a JMESPath query combined with table output to show concise instance information in an easily readable way. aws ec2 describe-instances --output table -...

aws-cli • The --query Parameter

Using Processing with Atom editor

There are several packages which can run Processing sketches in the Atom editor. These instructions use the Script package. There are also available packages for syntax highlighting and autocomplete, which are required for Script to identify Processing filetypes. Install the Script plugin. Either b...

processing • Using Processing with Alternative Code Editors like Sublime and Atom

Advanced Functions

Advanced functions behave the in the same way as cmdlets. The PowerShell ISE includes two skeletons of advanced functions. Access these via the menu, edit, code snippets, or by Ctrl+J. (As of PS 3.0, later versions may differ) Key things that advanced functions include are, built-in, customiz...

PowerShell • Modules, Scripts and Functions