NodeJS/Javascript Merging Two unequal arrays

All,

I am writing, a proxy server using HAPIJS, Flow is like this,

1. Client--> HAPIJS (NodeJS) --> My Source API
2. When hit login service I will get cookies from My Source API is stored in the database
3. Now when I invoke another source api, it will return another set of cookies.

My Requirement is merging those arrays.

var cookie = ["dwanonymous_e2c6f8d7717c2d7504ef19ac1c9bec84=beilcabnrjOL6sxvPlTKeVNG2y; Version=1; Max-Age=15552000; Expires=Tue, 22-Sep-2015 14:03:19 GMT; Path=/", "dwsecuretoken_e2c6f8d7717c2d7504ef19ac1c9bec84=4gvDTcZD46MDDPZbiclvkj0aYtWfaWVRDA==; Version=1; Path=/; Secure; HttpOnly", "dwsid=OpzBeljqH7SuLFA88ZH9Fd_fGze-oihgfyA3Duv6FbqKjtZiGia0AW2slUuQgeWzJCwo0VzhXV6kKaeuissKkQ==; path=/; HttpOnly"]

var cookie2 = ["dwanonymous_e2c; Version=1; Max-Age=15552000; Expires=Tue, 22-Sep-2015 14:03:19 GMT; Path=/", "dwsecuretoken_e2c6f8d7717c2d7504ef19ac1c9bec84=ix9wk1fwChTLK114YG-2ZQHlL-P201JMRA==; Version=1; Path=/; Secure; HttpOnly","dwper_e2c;Version=1; Path=/; Secure; HttpOnly"]

var prepCookie1 = [];

for (var i = 0; i < cookie.length; i++) {
    console.log(cookie[i], cookie.length)
    second(cookie[i], i)
}

function second(db, inde) {
    var getComparer1 = getComparer(db);
    for (var j = 0; j < cookie2.length; j++) {
        var getComparer2 = getComparer(cookie2[j]);
        if (getComparer1 === getComparer2) {
            prepCookie1.push(cookie2[j]);
            cookie.splice(inde, 1)
            cookie2.splice(inde, 1)
        } else {
            prepCookie1.push(db);
            cookie.splice(inde, 1)
        }
    }
}


console.log(prepCookie1) 

//[ 'dwanonymous_e2c; Version=1; Max-Age=15552000; Expires=Tue, 22-Sep-2015 14:03:19 GMT; Path=/',
//'dwsid=OpzBeljqH7SuLFA88ZH9Fd_fGze-oihgfyA3Duv6FbqKjtZiGia0AW2slUuQgeWzJCwo0VzhXV6kKaeuissKkQ==; path=/; HttpOnly' ]

function getComparer(c) {
    var compare;
    if (c) {
        var cookieOne = c.split(';')[0];
        compare = cookieOne.substring(0, cookieOne.indexOf('_'));
        if (compare.indexOf('=') > -1) {
            compare = compare.substring(0, compare.indexOf('='))
        }
    }
    return compare
}

Actually my result should be,

[ 'dwanonymous_e2c; Version=1; Max-Age=15552000; Expires=Tue, 22-Sep-2015 14:03:19 GMT; Path=/','dwsid=OpzBeljqH7SuLFA88ZH9Fd_fGze-oihgfyA3Duv6FbqKjtZiGia0AW2slUuQgeWzJCwo0VzhXV6kKaeuissKkQ==; path=/; HttpOnly',"dwsecuretoken_e2c6f8d7717c2d7504ef19ac1c9bec84=ix9wk1fwChTLK114YG-2ZQHlL-P201JMRA==; Version=1; Path=/; Secure; HttpOnly","dwper_e2c;Version=1; Path=/; Secure; HttpOnly"]

But my code gives below output, Someone help me what i am doing wrong here? i am newbie.

[ 'dwanonymous_e2c; Version=1; Max-Age=15552000; Expires=Tue, 22-Sep-2015 14:03:19 GMT; Path=/','dwsid=OpzBeljqH7SuLFA88ZH9Fd_fGze-oihgfyA3Duv6FbqKjtZiGia0AW2slUuQgeWzJCwo0VzhXV6kKaeuissKkQ==; path=/; HttpOnly' ]