Tutorial by Examples: g

PHP 5.x5.4 When you build REST API's, you may need to reduce the information of an object to be passed to the client application. For this purpose, this example illustrates how to use the JsonSerialiazble interface. In this example, the class User actually extends a DB model object of a hypotetica...

[JsonObject("person")] public class Person { [JsonProperty("name")] public string PersonName { get; set; } [JsonProperty("age")] public int PersonAge { get; set; } [JsonIgnore] public string Address { get; set; } } Person person = new...

We can use the Service Container as a Dependency Injection Container by binding the creation process of objects with their dependencies in one point of the application Let's suppose that the creation of a PdfCreator needs two objects as dependencies; every time we need to build an instance of PdfCr...

There are multiple ways to create a sequence. You can use functions from the Seq module: // Create an empty generic sequence let emptySeq = Seq.empty // Create an empty int sequence let emptyIntSeq = Seq.empty<int> // Create a sequence with one element let singletonSeq = Seq.s...

Consider the following example assuming that you have a ';'-delimited CSV to load into your database. 1;max;male;manager;12-7-1985 2;jack;male;executive;21-8-1990 . . . 1000000;marta;female;accountant;15-6-1992 Create the table for insertion. CREATE TABLE `employee` ( `id` INT NOT NULL , ...

Syntax is: LEFT ( string-expression , integer ) RIGHT ( string-expression , integer ) SELECT LEFT('Hello',2) --return He SELECT RIGHT('Hello',2) --return lo Oracle SQL doesn't have LEFT and RIGHT functions. They can be emulated with SUBSTR and LENGTH.SUBSTR ( string-expression, 1, intege...

What if you want to rollback the latest migration i.e recent operation, you can use the awesome rollback command. But remember that this command rolls back only the last migration, which may include multiple migration files php artisan migrate:rollback If you are interested in rolling back all o...

console.time() can be used to measure how long a task in your code takes to run. Calling console.time([label]) starts a new timer. When console.timeEnd([label]) is called, the elapsed time, in milliseconds, since the original .time() call is calculated and logged. Because of this behavior, you can ...

When using async await in loops, you might encounter some of these problems. If you just try to use await inside forEach, this will throw an Unexpected token error. (async() => { data = [1, 2, 3, 4, 5]; data.forEach(e => { const i = await somePromiseFn(e); console.log(i); }); ...

Using the collect() helper, you can easily create new collection instances by passing in an array such as: $fruits = collect(['oranges', 'peaches', 'pears']); If you don't want to use helper functions, you can create a new Collection using the class directly: $fruits = new Illuminate\Support\Co...

These functions are very similar in behaviour. The difference is that ng-if removes elements from the DOM. If there are large parts of the code that will not be shown, then ng-if is the way to go. ng-show will only hide the elements but will keep all the handlers. ng-if The ngIf directive removes ...

ngOptions is a directive that simplifies the creation of a html dropdown box for the selection of an item from an array that will be stored in a model. The ngOptions attribute is used to dynamically generate a list of <option> elements for the <select> element using the array or object o...

In other frameworks pagination is headache. Laravel makes it breeze, it can generate pagination by adding few lines of code in Controller and View. Basic Usage There are many ways to paginate items, but the simplest one is using the paginate method on query builder or an Eloquent query. Laravel ou...

Each domain supported in the app needs to make available its own apple-app-site-association file. If the content served by each domain is different, then the contents of the file will also change to support the respective paths. Otherwise, the same file can be used, but it needs to be accessible at ...

Note: You can skip this part if your server uses HTTPS to serve content and jump to Application Setup guide. If your app targets iOS 9 and your server uses HTTPS to serve content, you don’t need to sign the file. If not (e.g. when supporting Handoff on iOS 8), it has to be signed using a SSL certif...

The setup on the app side requires two things: Configuring the app’s entitlement, and enabling the universal links by turning on the Associated Domains capability in the project. Handling Incoming Links in your AppDelegate. 1. Configuring the app’s entitlement, and enabling universal links. ...

Mage::log('My log entry', null, 'mylogfile.log'); This wil log to /var/log/mylogfile.log

Mage::log('My log entry'); Mage::log('My log message: '.$myVariable); Mage::log($myArray); Mage::log($myObject); This will log to /var/log/system.log Objects and Arrays are automatically written via a print_r() directive. Watch out when using objects since these can get substantial in size. ...

A common usecase for the ready() hook is to access the DOM, e.g. to initiate a Javascript plugin, get the dimensions of an element etc. The problem Due to Vue's asynchronous DOM update mechanism, it's not guaranteed that the DOM has been fully updated when the ready() hook is called. This usually ...

The goto operator allows to jump to another section in the program. It's available since PHP 5.3. The goto instruction is a goto followed by the desired target label: goto MyLabel;. The target of the jump is specified by a label followed by a colon: MyLabel:. This example will print Hello World!...