Re: [問題] javascript 的 private 屬性
※ 引述《BBSealion (海獅)》之銘言：
: Private members are made by the constructor. Ordinary vars and parameters of
: the constructor becomes the private members.
: function Container(param) {
: this.member = param;
: var secret = 3;
: var that = this;
: }
: This constructor makes three private instance variables: param, secret, and
: that. They are attached to the object, but they are not accessible to the
: outside, nor are they accessible to the object's own public methods.
: by http://javascript.crockford.com/private.html
: ---
: 我知道private的用意就是保護變數不被亂動
: 但另一個他該有的功能是: 在自己的method中能被使用
: 不然我為了自己要用他就得開getter給他，如此變成您說的無意義了
: 我想js的邏輯跟C應該不太一樣，所以有點困惑中
: 但應該有個對應的做法
用解釋的很麻煩乾脆丟程式
function ThisIsMyClass() {
var secret = 0;
this.methodAdd = function() {
secret += 1;
}
this.getSecret = function() {
return secret;
}
}
var instance = new ThisIsMyClass();
instance.methodAdd();
instance.methodAdd();
instance.methodAdd();
instance.getSecret(); // 3
instance.secret; // undefined
自己內部的method使用時不需要getter跟setter
只有給外部使用時才需要寫getter跟setter
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◆ From: 122.116.190.145
※ 編輯: mrbigmouth 來自: 122.116.190.145 (02/22 17:54)
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