我的javascript范围有什么问题
这个问题在这里已经有了答案：
在封闭函数中存储this的引用并使用它：
var me = this;
this.suits.forEach(function(currentSuit) {
console.log(me.suits);
});
或者使用bind ：
this.suits.forEach(function(currentSuit) {
console.log(this.suits);
}.bind(this));
或者使用forEach的第二个参数:(这可能是最好的解决方案。）
this.suits.forEach(function(currentSuit) {
console.log(this.suits);
}, this);
你检查它是这样的（？）：
$this = this;
this.suits.forEach(function(currentSuit){
var scope = $this;
console.log(scope);
});
首先将参考变量保存到甲板作用域中...
function Deck(){
var self = this; // save a reference to the deck context
this.suits = [ // this is an array now
{
'suit': 'diamonds',
'symbol': '♦',
'color': 'red'
}
]; // close suits
this.cardValues = [
{
'name': 'ace',
'face': 'A',
'value': 1
}
]; // close cardValues
this.cards = [];
console.log(this);
this.suits.forEach(function(currentSuit){
var scope = self;
console.log(scope);
// scope doesn't work.
// obviously, scope references window
// so how do i get it to refer to the deck like it's supposed to.
// i looked into using call and apply, and even though the concepts
// made sense i couldn't figure it out.
// fuck this is frustrating!
});
}