Tutorial by Examples: t

You can use Snackbar.Callback to listen if the snackbar was dismissed by user or timeout. Snackbar.make(getView(), "Hi snackbar!", Snackbar.LENGTH_LONG).setCallback( new Snackbar.Callback() { @Override public void onDismissed(Snackbar snackbar, int event)...
Guice is a Java library. To use it you have to add a JAR file into the classpath of your Java project. Sample classes Below are several classes for a "Hello, world!" example. An interface of a hello "service": public interface HelloWorldService { public void sayHello(); ...
DECLARE @startdate CHAR(8), @numberDays TINYINT SET @startdate = '20160101' SET @numberDays = 10; WITH CTE_DatesTable AS ( SELECT CAST(@startdate as date) AS [date] UNION ALL SELECT DATEADD(dd, 1, [date]) FROM CTE_DatesTable WHERE DATEADD(dd, 1, [date]) <= DateAdd(DAY, @nu...
Integer literals are used to provide integral values. Three numerical bases are supported, indicated by prefixes: BasePrefixExampleDecimalNone5Octal00345Hexadecimal0x or 0X0x12AB, 0X12AB, 0x12ab, 0x12Ab Note that this writing doesn't include any sign, so integer literals are always positive. Somet...
Table showing size and values range of all primitive types: data typenumeric representationrange of valuesdefault valuebooleann/afalse and truefalsebyte8-bit signed-27 to 27 - 10-128 to +127short16-bit signed-215 to 215 - 10-32,768 to +32,767int32-bit signed-231 to 231 - 10-2,147,483,648 to +2,147,...
XHProf is a PHP profiler originally written by Facebook, to provide a more lightweight alternative to XDebug. After installing the xhprof PHP module, profiling can be enabled / disabled from PHP code: xhprof_enable(); doSlowOperation(); $profile_data = xhprof_disable(); The returned array wil...
Currying is the technique of translating the evaluation of a function that takes multiple arguments into evaluating a sequence of functions, each with a single argument. This is normally useful when for example: different arguments of a function are calculated at different times. (Example 1) di...
Some recommended PEP8 style guidelines for imports: Imports should be on separate lines: from math import sqrt, ceil # Not recommended from math import sqrt # Recommended from math import ceil Order imports as follows at the top of the module: Standard libr...
The typical workflow of training and using neural networks, regardless of the library used, goes like this: Training Data Getting the training data: the X variable is the input, and the Y variable is the output. The simplest thing to do is to learn a logic gate, where X is a vector or two number...
Please read Preventing SQL injection with Parametrized Queries for a complete discussion of why prepared statements help you secure your SQL statements from SQL Injection attacks The $conn variable here is a MySQLi object. See MySQLi connect example for more details. For both examples, we assume t...
Giving this enumeration as Example: enum Compass { NORTH(0), EAST(90), SOUTH(180), WEST(270); private int degree; Compass(int deg){ degree = deg; } public int getDegree(){ return degree; } } In Java an enum class is like any other c...
The sum 20 + 21 + 22 + ... + 2n-1 simplifies to 2n - 1. This explains why the maximum value that can be stored in an unsigned 32-bit integer is 232 - 1.
The sum of the geometric series r0 + r1 + r2 + ... + rn-1 In the case where r ≠ 1, simplifies to (rn - 1) / (r - 1). If r < 1, this sum is bounded from above by 1 / (1 - r). If r = 1, this sum is rn.
In /res/values/strings.xml: <string-array name="spinner_options"> <item>Option 1</item> <item>Option 2</item> <item>Option 3</item> </string-array> In layout XML: <Spinner android:id="@+id/spinnerName" ...
Direct Download - download link CDN - get here Bower - bower install bootstrap [read] NPM - npm install bootstrap [read] Composer - composer require twbs/bootstrap [read] Customize - I you have your own config, you can customize here. Sass - For Sass related projects you may get it here. ...
How do you go about using an instance of a (possibly further) inherited generic type within a method declaration in the generic type itself being declared? This is one of the problems you will face when you dig a bit deeper into generics, but still a fairly common one. Assume we have a DataSeries&l...
apologies: since I don't know of a channel for discussing/providing feedback on requests for improvement, I'm going to put my question here. Please feel free to point out a better place for this! @DataTx states that this is "completely unclear, incomplete, or has severe formatting problems&quot...
A texture is a form of data storage that allows convenient access not just to particular data entries, but also to sample points mixing (interpolating) multiple entries together. In OpenGL textures can be used for many things, but most commonly it's mapping an image to a polygon (for example a tria...
To enable Second Level Caching for Hibernate in WildFly, add this property to your persistence.xml file: <property name="hibernate.cache.use_second_level_cache" value="true"/> You may also enable Query Caching with this property: <property name="hibernate.cache...
By default, Eloquent models expect for the primary key to be named 'id'. If that is not your case, you can change the name of your primary key by specifying the $primaryKey property. class Citizen extends Model { protected $primaryKey = 'socialSecurityNo'; // ... } Now, any Eloqu...

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