JS代码片段

1. 对比cookie

// cookie array

function getCookieArrayByStr(str)
{
    var cookies = str.split("; ");
    var cookieObj = {}
    for (var i=0; i<cookies.length; i++)
    {
        var line = cookies[i];
        var pos = line.indexOf("=");
        var key = line.substr(0, pos);
        var val = line.substr(pos+1);
        cookieObj[key] = val;
    }
    return cookieObj;
}

function getCookieArray()
{
    return getCookieArrayByStr(document.cookie);
}


function compareCookie(strOldCookie)
{
    var objOld = getCookieArrayByStr(strOldCookie);
    var objNew = getCookieArray();
    
    var oldOnly = {};
    var newOnly = {};
    var diff = {};
    
    for (var key1 in objOld)
    {
        var val1 = objOld[key1];
        var val2 = objNew[key1];
        if (typeof(val2) == "undefined")
        {
            oldOnly[key1] = val1;
        }
        else
        {
            if (val1 != val2)
            {
                diff[key1] = {oldVal: val1, newVal: val2};
            }
        }
    }
    
    
    for (var key2 in objNew)
    {
        var val1 = objOld[key2];
        var val2 = objNew[key2];
        if (typeof(val1) == "undefined")
        {
            newOnly[key2] = val2;
        }
    }
    
    var retObj = {};
    retObj.__OLDO = oldOnly;
    retObj.__NEWO = newOnly;
    retObj.__DIFF = diff;
    
    return retObj;
}

var strOldCookie = "cookieUserId=1386816500920952; cuid=1386816500920605"

var ret = compareCookie(strOldCookie);