Tutorial by Examples: l

The "child" components of a component are available on a special prop, props.children. This prop is very useful for "Compositing" components together, and can make JSX markup more intuitive or reflective of the intended final structure of the DOM: var SomeComponent = function ...

APT and APT-GET Easiest and fastest way is with apt-get command. This command may be considered as lower-level and "back-end", and support other APT-based tools. There are no fancy loaders, only basic progress info. This is fastest way for installing apps. Usage: sudo apt-get install ...

To check if a method was called on a mocked object you can use the Mockito.verify method: Mockito.verify(someMock).bla(); In this example, we assert that the method bla was called on the someMock mock object. You can also check if a method was called with certain parameters: Mockito.verify(som...

If a scoped enum is converted to an integral type that is too small to hold its value, the resulting value is unspecified. Example: enum class E { X = 1, Y = 1000, }; // assume 1000 does not fit into a char char c1 = static_cast<char>(E::X); // c1 is 1 char c2 = static_cast<c...

Singletons are a frequently used design pattern which consists of a single instance of a class that is shared throughout a program. In the following example, we create a static property that holds an instance of the Foo class. Remember that a static property is shared between all objects of a class...

Setting overflow value to hidden,auto or scroll to an element, will clear all the floats within that element. Note: using overflow:scroll will always show the scrollbox

Editor templates are a good way to reuse Razor code. You can define editor templates as Razor partial views and then use them in other views. Editor templates usually exist in the Views/Shared/EditorTemplates/ folder, although they can also be saved to the Views/ControllerName/EditorTemplates/ fold...

In IDE Jaspersoft Studio (JSS) or the older version iReport Designer it is sufficient to press Preview. The JasperReports design file .jrxml will automatically be compiled to .jasper in same folder as .jrxml if no errors are present. Another way is to press "Compile Report" button in JSS...

Multidimensional Arrays As the name indicates, multi dimensional arrays are arrays that contain more than one dimension, usually two or three but it can have up to 32 dimensions. A multi array works like a matrix with various levels, take in example a comparison between one, two, and three Dimensi...

Using git show we can view a single commit git show 48c83b3 git show 48c83b3690dfc7b0e622fd220f8f37c26a77c934 Example commit 48c83b3690dfc7b0e622fd220f8f37c26a77c934 Author: Matt Clark <[email protected]> Date: Wed May 4 18:26:40 2016 -0400 The commit message will be show...

A locator in Protractor is used to perform action on HTML dom elements. The most common and best locators used in Protractor are css, id, model and binding. For example commonly used locators are: by.css('css-selector') by.id('id')

NSLog(@"%s %d %s, yourVariable: %@", __FILE__, __LINE__, __PRETTY_FUNCTION__, yourVariable); Will log the file, line number and function data along with any variables you want to log. This can make the log lines much longer, particularly with verbose file and method names, however it ca...

Sitecore Instance Manager is open-source tool which is used for managing the local park of Sitecore instances. You can install, locate, maintain, reinstal or delete Sitecore products. It also helps you install your sitecore instance with any sitecore packages, modules and only thing you need to do i...

You can use Modules to build more complex classes through composition. The include ModuleName directive incorporates a module's methods into a class. module Foo def foo_method puts 'foo_method called!' end end module Bar def bar_method puts 'bar_method called!' end end ...

A link to any text by using typolink object lib.link = TEXT lib.link { value = Here is link text typolink { #You can give page uid or any external url here parameter = http://www.example.com/ #Target of link extTarget = _blank ...

When creating a UIView subclass, intrinsic content size helps to avoid setting hardcoded height and width constraints a basic glimpse into how a class can utilize this class ImageView: UIView { var image: UIImage { didSet { invalidateIntrinsicContentSize() } ...

CREATE TABLE new_table_name LIKE existing_table_name;

What you need is to get an entitlements file so the app can access your iCloud and write records using CloudKit. Follow the steps to grant access to iCloud from your app: 1- Select the project in the Project Navigator, and then open the General tab. 2- In the Identity section, set your developer ...

All the records create using CloudKit-related code can be previewed, edited and even removed in CloudKit Dashboard. To access CloudKit Dashboard, go here. There are several parts in the dashboard: Record Types (which will be discussed later) Security Roles (which is where you can set databases ...

To save date to CloudKit, we must make: A CKRecordID (the key of your unique record) A CKRecord (which includes data) Making a record key To ensure that every new record identifier is unique, we use the current timestamp, which is unique. We get the timestamp using NSDate's method timeInter...