function Animal(name) {
this.name = name
this._init()
this._add()
}
Animal.prototype._init = function() {
this.food = []
console.log(this.food)
}
Animal.prototype._add = function() {
console.log(1)
this.food.push("fish")
this.food.push("mouse")
console.log(2)
}
var a = new Animal("cat")execution result:
my question is: the _ add method executes after the _ init method. Why is the output this.food already assigned? I don"t understand. I hope someone can help me understand b. Thank you!