Tutorial by Examples: del

Using faker And ModelFactories to generate Seeds

1) BASIC SIMPLE WAY Database-driven applications often need data pre-seeded into the system for testing and demo purposes. To make such data, first create the seeder class ProductTableSeeder use Faker\Factory as Faker; use App\Product; class ProductTableSeeder extends DatabaseSeeder { pub...

Laravel • Database Seeding

The delete operator

The delete operator deletes a property from an object. Syntax: delete object.property delete object['property'] Returns: If deletion is successful, or the property did not exist: true If the property to be deleted is an own non-configurable property (can't be deleted): false in non...

JavaScript • Unary Operators

Setting the Default Date Format Model

When Oracle implicitly converts from a DATE to a string or vice-versa (or when TO_CHAR() or TO_DATE() are explicitly called without a format model) the NLS_DATE_FORMAT session parameter will be used as the format model in the conversion. If the literal does not match the format model then an excepti...

Oracle Database • Dates

Destroy, Delete, or Unset an Array

To destroy, delete, or unset an array: unset array To destroy, delete, or unset a single array element: unset array[10]

Bash • Arrays

Safe invoke multicast delegate

Ever wanted to call a multicast delegate but you want the entire invokation list to be called even if an exception occurs in any in the chain. Then you are in luck, I have created an extension method that does just that, throwing an AggregateException only after execution of the entire list complete...

C# Language • Delegates

The View-Model

The view-model is the "VM" in MVVM. This is a class that acts as a go-between, exposes the model(s) to the user interface (view), and handling requests from the view, such as commands raised by button clicks. Here is a basic view-model: public class CustomerEditViewModel { /// <s...

wpf • MVVM in WPF

The Model

The model is the first "M" in MVVM. The model is usually a class containing the data that you want to expose via some kind of user interface. Here is a very simple model class exposing a couple of properties:- public class Customer : INotifyPropertyChanged { private string _forenam...

wpf • MVVM in WPF

Delete one line containing a pattern

Given a file file.txt with the following content: line 1 line 2 line 3 You can delete a line from file content with the d command. The pattern to match is surrounded with default / delimiter and the d command follows the pattern: sed '/line 2/d' file.txt The above command will output: l...

sed • Delete command

Delegating to other Generator

From within a generator function, the control can be delegated to another generator function using yield*. function* g1() { yield 2; yield 3; yield 4; } function* g2() { yield 1; yield* g1(); yield 5; } var it = g2(); console.log(it.next()); // 1 console.log(it.next())...

JavaScript • Generators

Deleting Instances

To delete persisted objects use delete(): session.delete(obj) Actual deletion from the database will happen on next flush.

sqlalchemy • The Session

Bind to property of another named element

You can bind to a property on a named element, but the named element must be in scope. <StackPanel> <CheckBox x:Name="MyCheckBox" IsChecked="True" /> <TextBlock Text="{Binding IsChecked, ElementName=MyCheckBox}" /> </StackPanel>

wpf • Introduction to WPF Data Binding

Style Guide and elm-format

The official style guide is located on the homepage and generally goes for: readability (instead of compactness) ease of modification clean diffs This means that, for example, this: homeDirectory : String homeDirectory = "/root/files" evaluate : Boolean -> Bool evalua...

Elm Language • Getting started with Elm Language

Variant delegates

Delegates may have variant type parameters. delegate void Action<in T>(T t); // T is an input delegate T Func<out T>(); // T is an output delegate T2 Func<in T1, out T2>(); // T1 is an input, T2 is an output This follows from the Liskov Substitution Principle, w...

C# Language • Generics

Delete a pattern from the beginning of a string

Shortest match: $ a='I am a string' $ echo "${a#*a}" m a string Longest match: $ echo "${a##*a}" string

Bash • Bash Parameter Expansion

Delete a pattern from the end of a string

Shortest match: $ a='I am a string' $ echo "${a%a*}" I am Longest match: $ echo "${a%%a*}" I

Bash • Bash Parameter Expansion

Delegated Events

Let's start with example. Here is a very simple example HTML. Example HTML <html> <head> </head> <body> <ul> <li> <a href="some_url/">Link 1</a> </li> &l...

jQuery • Events

Delete an item in a list

SP.SOD.executeOrDelayUntilScriptLoaded( function(){ deleteItem(1); }, "sp.js"); function deleteItem(id){ var clientContext = new SP.ClientContext(); var list = clientContext.get_web().get_lists().getByTitle("List Title"); var item = list.getItemById(id); it...

sharepoint • Working with JavaScript Client Object Model (JSOM)

ngModel

With ng-model you can bind a variable to any type of input field. You can display the variable using double curly braces, eg {{myAge}}. <input type="text" ng-model="myName"> <p>{{myName}}</p> As you type in the input field or change it in any way you will s...

AngularJS • Built-in directives

With a through model

class Skill(models.Model): name = models.CharField(max_length=50) description = models.TextField() class Developer(models.Model): name = models.CharField(max_length=50) skills = models.ManyToManyField(Skill, through='DeveloperSkill') class DeveloperSkill(models.Model): ...

Django • Many-to-many relationships

Code Lens

Code lens is a simple way to know what happens with the code. Here you could find an image with the number of references of a method or class. If you can't see the code lens please see this question: Missing CodeLens references count in VS 2015 Community edition

Visual Studio • Visual Studio tools