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我试图解析从here抓取的json。基本上我所做的是迭代这些项目,对它们进行排序,然后显示它们。但是我收到一个错误,说data.data.children[i] is undefined
。解析json时未定义的变量错误
我不知道为什么它这样做,但?
var json = 'http://www.reddit.com/reddits/mine/.json';
GM_xmlhttpRequest({
method: "GET",
url: json,
onload: reddits
});
function reddits(response){
var txt = response.responseText;
var data;
var suggested = document.getElementById('suggested-reddits');
if(window.JSON && JSON.parse){
data = JSON.parse(txt);
}
else{
data = eval("("+txt+")");
}
suggested.innerHTML += '<span>reddits you\'re subscribed to </span> <ul id="rsub"></ul>';
GM_addStyle('#rsub{width: 500px;}');
var reddits = new Array();
var rsub = document.getElementById('rsub');
for(i = 0; i <= data.data.children.length; i++){
var r = data.data.children[i].data.display_name;
reddits.push(r);
}
sort(reddits);
for(i = 0; i <= reddits.length; i++){
rsub.innerHTML += '<li><a href="#" onclick="set_sr_name(this); return false">' + reddits[i] + '</a></li>';
}
}