Ir al contenido principal

Flutter / Model class


Constructor
Can be many

class Todo {
int _id;
String _title;
String _descrition;
String _date;
int _priority;

Todo(this._title, this._priority, this._date, [this._descrition]);
Todo.withID(this._id, this._title, this._priority, this._date,
[this._descrition]);
}

Getter
int get id => _id;
String get title => _title;

Setter
set title(String newTitle) {
if (newTitle.length <= 255) {
_title = newTitle;
}
}

set descrition(String newDescrition) {
if (newDescrition.length <= 255) {
_descrition = newDescrition;
}
}


Dynamic
Map<String, dynamic> toMap() {
var map = Map<String, dynamic>();
map["title"] = _title;
map["description"] = _descrition;
map["priority"] = _priority;
map["date"] = _date;
if (_id != null) {
map["id"] = _id;
}

return map;
}


from Dynamic
Todo.fromObject(dynamic o){
this._id = o["id"];
this._title = o["title"];
this._descrition = o["description"];
this._priority = o["priority"];
this._date = o["date"];
}





Comentarios

Entradas populares de este blog

C# Using tabs

To use tabs in C# use the TabContainer element from AjaxControlToolkit Include AjaxControlToolkit  Include in the Web.config file, inside the tag <system.web> the following code  <pages>       <controls>         <add tagPrefix="ajaxCTK" namespace="AjaxControlToolkit" assembly="AjaxControlToolkit"/>       </controls>     </pages>   Include TabContainer element First  include TabContainer element that is the section where all the tabs will be displayed. <ajaxCTK:TabContainer ID="TabContainerUpdate" runat="server"                 Height="800"                 CssClass="ajax__tab_style"> </ajaxCTK:TabContainer> Second per each tab include the following code corresponding to each ...

Python create package

Create a root folder Create a sub-folder "example_pkg" that contains the funtionallity packaging_tutorial/ example_pkg/ __init__.py In the root folder create the following structure  packaging_tutorial/ example_pkg/ __init__.py tests/ setup.py LICENSE README.md in the setup.py contains the configuration of the packages your package is found by find_packages() import setuptools with open ( "README.md" , "r" ) as fh : long_description = fh . read () setuptools . setup ( name = "example-pkg-YOUR-USERNAME-HERE" , # Replace with your own username version = "0.0.1" , author = "Example Author" , author_email = "author@example.com" , description = "A small example package" , long_description = long_description , long_description_content_type = "text/markdown" , url = "https://github.com/pypa/sam...

Rails - Basic Steps III

pValidations Validations are a type of ActiveRecord Validations are defined in our models Implement Validations Go to   root_app/app/models Open files  *.rb for each model Mandatory field validates_presence_of   :field Ex:   validates_presence_of    :title Classes The basic syntax is class MyClass        @global_variable                def my_method              @method_variable        end end Create an instance myInstance = MyClass.new Invoke a mehod mc.my_method class() method returns the type of the object In Ruby, last character of method define the behavior If ends with a question -> return a boolean value If ends with an exclamation -> change the state of the object Getter / Setter method def global_variable       return @global_variable end ...