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drakedrake
What is prototype ?
Wikipedia Say: …樣品 (prototype)是指某種新技術在投入量產之前的所作的模型,用以檢測產品質量,保障正常運行。在電子技術、機械工程、車輛工程等方面廣泛運用,實驗產品相應地被稱為樣機,樣車等。
Of Objects and Classes JavaScript is full of objects
Ex: Array in JavaScript is an object with values and also methods like push, reverse, and pop
Where does a method like push come from?
Of Prototypes Every object in JavaScript holds a hidden piece of
state How can we grab that reference ?
Object.getPrototypeOf(point) != Object.getPrototypeOf(myArray);
__proto__
What Makes Prototypes Special?
Example
Sharing Prototypes
Example
Of Functions Functions in JavaScript are objects Every function object in JavaScript has a prototypeprototype
property
Do not confuse this prototype property prototype property with the __proto__ __proto__ property – they do not serve the same purpose or point to the same object.
Imagine we want to create a new object and make the new object behave like an array
Constructor Functions The first letter of a constructor function is
capitalized by convention A constructor function expects to be used in
conjunction with the new operator to construct objects.
Reference http://msdn.microsoft.com/en-us/magazine/ff852808.aspx