Tutorial by Examples: u

BackAndroid.addEventListener('hardwareBackPress', function() { if (!this.onMainScreen()) { this.goBack(); return true; } return false; }); Note: this.onMainScreen() and this.goBack() are not built in functions, you also need to implement those. (https://github.c...

In Groovy, the inject() method is one of the cumulative methods that allows us to add (or inject) new functionality into any object that implements the inject() method. In the case of a Collection, we can apply a closure to a collection of objects uniformly and then collate the results into a single...

Since there is no STRING_SPLIT function we need to use XML hack to split the string into rows: Example: SELECT split.a.value('.', 'VARCHAR(100)') AS Value FROM (SELECT Cast ('<M>' + Replace('A|B|C', '|', '</M><M>')+ '</M>' AS XML) AS Data) AS A CROSS apply data...

Overview These instructions are for acquiring, building, and installing openssl from source. Openssl is usually included in package managers as well. Resources https://github.com/openssl/openssl Dependencies make perl 5 gcc/clang git Dependencies can be installed through a package mana...

Complete the Installation and setup part to connect your app to Firebase. This will create the project in Firebase. Add the dependency for Firebase CrashReporting to your module-level build.gradle file: compile 'com.google.firebase:firebase-crash:9.4.0'

public class SoundActivity extends Activity { private MediaPlayer mediaPlayer; ProgressBar progress_bar; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_tool_sound); ...

Problem: Vim users are not always happy. Solution: Make them happy. 7.4 :smile Note: Requires patch version ≥7.4.1005

To get the the exact size of a UIButton's text based on its font, use the function intrinsicContentSize. Swift button.intrinsicContentSize.width Objective-C button.intrinsicContentSize.width;

NSString provides method boundingRectWithSize which can be used to predict the resulting CGSize of a UILabel based on its text and font without the need of creating a UILabel Objective-C [[text boundingRectWithSize:maxSize options:(NSStringDrawingTruncatesLastVisibleLine | NSStringDrawingUsesLineF...

You should use this when you have two text fields that should receive exactly the same content. For example, you may want to confirm an email address or a password. This validation creates a virtual attribute whose name is the name of the field that has to be confirmed with _confirmation appended. ...

The :on option lets you specify when the validation should happen. The default behavior for all the built-in validation helpers is to be run on save (both when you're creating a new record and when you're updating it). class Person < ApplicationRecord # it will be possible to update email wi...

UIView *view = [[UIView alloc] init]; [self.view addSubview:view]; //Use the function if you want to use height as constraint [self addView:view onParentView:self.view withHeight:200.f]; //Use this function if you want to add view with respect to parent and should resize with it [self a...

Angular Forms and Inputs have various states that are useful when validating content Input States StateDescription$touchedField has been touched$untouchedField has not been touched$pristineField has not been modified$dirtyField has been modified$validField content is valid$invalidField content is ...

To help you find and count characters in a string, CharMatcher provides the following methods: int indexIn(CharSequence sequence) Returns the index of the first character that matches the CharMatcher instance. Returns -­1 if no character matches. int indexIn(CharSequence sequence, int sta...

var source = new AutoCompleteStringCollection(); // Add your collection of strings. source.AddRange(new[] { "Guybrush Threepwood", "LeChuck" }); var textBox = new TextBox { AutoCompleteCustomSource = source, AutoCompleteMode = AutoCompleteMode.SuggestAppend, ...

A StringBuilder represents a series of characters, which unlike a normal string, are mutable. Often times there is a need to modify strings that we've already made, but the standard string object is not mutable. This means that each time a string is modified, a new string object needs to be created,...

You can configure the database settings in config/connections.js. Here's an example: postgresql: { database: 'databaseName', host: 'localhost', user: 'root', password: '', port: 5432, poolSize: 10, ssl: false }; Alternatively, you can supply the connection information in U...

Short circuiting is a functionality that skips evaluating parts of a (if/while/...) condition when able. In case of a logical operation on two operands, the first operand is evaluated (to true or false) and if there is a verdict (i.e first operand is false when using &&, first operand is tr...

If you are using Leiningen and your tests are located in the test directory in your project root then you can run your tests using lein test

OSX Implement the contract of the role-specific protocol (NSAccessibilityButton, NSAccessibilityImage, NSAccessibilityGroup, etc) within the NSAccessibility protocol that best matches the behavior of the GUI element being rendered. Linux / BSD For GNOME applications, the GNOME Accessibility Impl...