Tutorial by Examples: dynamic

There is also the ability to evaluate expressions when naming methods similar to how you can access an objects' properties with []. This can be useful for having dynamic property names, however is often used in conjunction with Symbols. let METADATA = Symbol('metadata'); class Car { construct...

Sometimes, just adding all the JARs from a folder isn't enough, for example when you have native code and need to select a subset of JARs. In this case, you need two main() methods. The first one builds a classloader and then uses this classloader to call the second main(). Here is an example which...

Applying css intuitively doesn't produce the desired results because vertical-align:middle isn't applicable to block-level elements margin-top:auto and margin-bottom:auto used values would compute as zero margin-top:-50% percentage-based margin values are calculated relative to the width of ...

You can return an anonymous object from your function public static object FunctionWithUnknowReturnValues () { /// anonymous object return new { a = 1, b = 2 }; } And assign the result to a dynamic object and read the values in it. /// dynamic object dynamic x = FunctionWithUnknowR...

Use case scenario: A table view consists of different columns with different data format that needs to be transformed with different pipes. table.component.ts ... import { DYNAMIC_PIPES } from '../pipes/dynamic.pipe.ts'; @Component({ ... pipes: [DYNAMIC_PIPES] }) export class Tabl...

When working with existing model that is quite big and is being regenerated quite often in cases where abstraction needed it might be costly to manually go around redecorating model with interfaces. In such cases one might want to add some dynamic behavior to model generation. Following example wil...

uses System.Generics.Collections, { TArray } System.Generics.Defaults; { TComparer<T> } var StringArray: TArray<string>; { Also works with "array of string" } ... { Sorts the array case insensitive } TArray.Sort<string>(StringArray, TComparer<string>...

In order to dynamically decide what beans to inject, we can use FactoryBeans. These are classes which implement the factory method pattern, providing instances of beans for the container. They are recognized by Spring and can be used transparently, without need to know that the bean comes from a fac...

Dynamic Proxies do not really have much to do with Reflection but they are part of the API. It's basically a way to create a dynamic implementation of an interface. This could be helpful when creating mockup services. A Dynamic Proxy is an instance of an interface that is created with a so-called in...

This is an example for how to handle dynamic key for response. Here A and B are dynamic keys it can be anything Response { "response": [ { "A": [ { "name": "Tango" }, { "name": "P...

The Leaflet package is designed to integerate with Shiny In the ui you call leafletOutput() and in the server you call renderLeaflet() library(shiny) library(leaflet) ui <- fluidPage( leafletOutput("my_leaf") ) server <- function(input, output, session){ out...

' Create filestream to file Using fileStream = New IO.FileStream("archive.zip", IO.FileMode.Create) ' open zip archive from stream Using archive = New System.IO.Compression.ZipArchive(fileStream, IO.Compression.ZipArchiveMode.Create) ' create file_in_archive.txt in arch...

Dynamic Arrays Adding and reducing variables on an array dynamically is a huge advantage for when the information you are treating does not have a set number of variables. Adding Values Dynamically You can simply resize the Array with the ReDim Statement, this will resize the array but to if you ...

When using the DllImport attribute you have to know the correct dll and method name at compile time. If you want to be more flexible and decide at runtime which dll and methods to load, you can use the Windows API methods LoadLibrary(), GetProcAddress() and FreeLibrary(). This can be helpful if the ...

$router = new \Phalcon\Mvc\Router(false); $router->removeExtraSlashes(true); $request = new \Phalcon\Http\Request(); $action = strtolower($request->getMethod()); // get, post, etc. $modules = ['calendar', 'main', 'user']; // names of the modules you create // you can define other static...

You can execute a database query from a String rather than a regular SOQL expression: String tableName = 'Account'; String queryString = 'SELECT Id FROM ' + tableName + ' WHERE CreatedDate >= YESTERDAY'; List<SObject> objects = Database.query(queryString); Since dynamic SOQL queries a...

Ruby offers define_method as a private method on modules and classes for defining new instance methods. However, the 'body' of the method must be a Proc or another existing method. One way to create a method from raw string data is to use eval to create a Proc from the code: xml = <<ENDXML ...

Create a Security class to run your ACL logic. <?php namespace Plugins; use Phalcon\Events\Event; use Phalcon\Mvc\Dispatcher; use Phalcon\Acl; use Phalcon\Acl\Role; use Phalcon\Acl\Resource; use Phalcon\Acl\Adapter\Memory as AclList; class Security extends \Phalcon\Mvc\User\Plugin ...

Newtonsoft's Json.NET allows you to bind json dynamically (using ExpandoObject / Dynamic objects) without the need to create the type explicitly. Serialization dynamic jsonObject = new ExpandoObject(); jsonObject.Title = "Merchent of Venice"; jsonObject.Author = "William Shakes...

CROSS APPLY enables you to "join" rows from a table with dynamically generated rows returned by some table-value function. Imagine that you have a Company table with a column that contains an array of products (ProductList column), and a function that parse these values and returns a set ...