Tutorial by Examples

Most examples of a function returning a value involve providing a pointer as one of the arguments to allow the function to modify the value pointed to, similar to the following. The actual return value of the function is usually some type such as an int to indicate the status of the result, whether ...

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...

Often the easiest solution is simply to pass 2D and higher arrays around as flat memory. /* create 2D array with dimensions determined at runtime */ double *matrix = malloc(width * height * sizeof(double)); /* initialise it (for the sake of illustration we want 1.0 on the diagonal) */ int x, y...

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...

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...

//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...

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...

//Enabling the proximity Sensor - (void)viewWillAppear:(BOOL)animated { [super viewWillAppear:animated]; [[UIDevice currentDevice] setProximityMonitoringEnabled:YES]; [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(sensorStateMonitor:) name:@"UIDevice...

01 a PIC 9. 01 b PIC 99. 01 c PIC 999. 01 s PIC X(4). 01 record-group. 05 field-a PIC 9. 05 field-b PIC 99. 05 field-c PIC 999. 01 display-record. 05 field-a PIC Z. 05 field-b PIC ZZ. 05 field-c PIC $Z9. *> numeric fields are moved left to right *> a set to...

The Google Analytics APIs allow you to access data within Google Analytics. It should not be confused with the measurement protocol which is used for inserting data into Google Analytics. The Google Analytics API is split into serval parts. Google Analytics Reporting APIs The Google Analytic...

MULTIPLY 5 BY a MULTIPLY a BY b ON SIZE ERROR PERFORM error-handling NOT ON SIZE ERROR PERFORM who-does-that END-MULTIPLY MULTIPLY a BY b GIVING x ROUNDED MODE IS PROHIBITED y ROUNDED MODE IS NEAREST-EVEN z ROUNDED ...

Any method in Rails model can return boolean value. simple method- ##this method return ActiveRecord::Relation def check_if_user_profile_is_complete User.includes( :profile_pictures,:address,:contact_detail).where("user.id = ?",self) end Again simple method returning bool...

This example uses the official Google .net Client library. PM> Install-Package Google.Apis.AnalyticsReporting.v4 Authorization Requires one of the following OAuth scopes: https://www.googleapis.com/auth/analytics.readonly https://www.googleapis.com/auth/analytics Oauth2 // The...

API requests are HTTP POST with the access token attached at the end of the API end point. Authorization Requires one of the following OAuth scopes: https://www.googleapis.com/auth/analytics.readonly https://www.googleapis.com/auth/analytics Note when posting the data use ContentType = &...

Create a folder in your project folder, and add your fonts to it. Example: Example: Here we added a folder in root called "mystuff", then "fonts", and inside it we placed our fonts: Add the below code in package.json. { ... "rnpm":...

Inside a Project configuration, you can Create build configuration: Manually Provide a Name and a Description. The Build Configuration ID is generated from the ProjectName, and the Build Configuration Name's. Once your configuraion is Saved, you can specify a Version Control Settings. This will ...

Whenever we want our assembly to install in GAC then it is must to have a strong name. For strong naming assembly we have to create a public key. To generate the .snk file. To create a strong name key file Developers command prompt for VS2015 (with administrator Access) At the command prompt...

bool is a datatype defined in C99. Boolean values are used in conditionals, such as if or while statements, to conditionally perform logic or repeat execution. When evaluating a conditional statement, the value 0 is considered “false”, while any other value is considered “true”. Because NULL ...

Example uses the Google APIs Dotnet client library. PM> Install-Package Google.Apis.AnalyticsReporting.v4 /// <summary> /// This method requests Authentcation from a user using Oauth2. /// Credentials are stored in System.Environment.SpecialFolder.Personal /// Do...

Usually when generating random numbers it is useful to generate integers within a range, or a p value between 0.0 and 1.0. Whilst modulus operation can be used to reduce the seed to a low integer this uses the low bits, which often go through a short cycle, resulting in a slight skewing of distribut...