1. ALL types: SImple types: Number, Boolean, String, null, undefined. Objective Types: Array, Function, Date, String / Why srting ? cause 'string'.length make a sense

2. Special values: 1/0 = Number.POSITIVE_INFINITY // Number.POSITIVE_INFINITY > @some_number | EXAMPLE: (1/0 > 2); OR (-1/0 < -2); -1/0 = Number.NEGATIVE_INFINITY Number(“something”) = NaN (error result)

3. NAN very special symbol, you need to know : NaN + 1 = NaN; NaN == NaN // false always. NOTE: NaN is never equal to itself! isNaN(NaN), isNaN('some_string') // true

4. Let's take a look my small app in MVC. Why we need models ? What is model. a model is where the data object is created.

4.0. small example:

var ModelExample = function ( data ) { // the model instance has a property called "myProperty" // created from the data's "yourProperty". this.myProperty = data.yourProperty;

// return the model instance
return this;

};

Let's take a look my models:

4.1. !!!Simple My-abstract-object var task = new Task() :

  function Task(source){
      source = Utils.object(source); // Utils.object - normalize-object-source
      this.name = Utils.string(source.name) || 'noname';
      //try Utils.number(source.name)
  }

4.2. !!!Complex My-abstract-object var user = new User();

  function User(source){
    source = Utils.object(source); // all time object because we normalize data-source
    this.name = Utils.string(source.name) || 'noname';
    this.avatar = new Avatar(source.avatar)
    //this.pass = // - i can also write simple function [method] for check - 'is it password not exipred, for example'?

    //also we can have dependencies beetwen few models.
    this.banForum = (new Author(source.forumData)).banForum;
  }

5. model.js Complex-models for data. Please check file: scripts/model.js

6. Why we need models:

   • avoid/reduce errors in templates: for example in response i got [undefined] instead [string], but (in controller /or in template ) i want call string.toLowerString() i will catch error;
   • in practice some different templates can use one-abstrac-data-object: for example User. thats why we need @normalize@ data-User for all templates.
   • avoid repeat code
   • for every model you can add method : for example User.prototype.setName = function() {}
   • prototyping Data : for example for User = {img : {'sm': '', lg: '', retina: ''}} I WANT img-object for all responses,

7. How we can use models in troops.js ? and we need it or not ?