CODEWITHSUNDEEP
javascriptjqueryarrayscookies
Alejandro Reinel
Alejandro Reinel

Reputation: 57

Add values to array cookie

I need to add new variables to an array, that is stored in a cookie. How could i do this ?

var arr = $.cookie("arr",[1, 2, 3, 4, 5, 6, 7, 8, 9]);
// this is an array of diferent numbers

function pri() { // this function create a number that is not in the array
var n = Math.floor((Math.random() * 15));
var tex;
while ((tex = $.inArray(n, arr)) != -1) {
    n = Math.floor((Math.random() * 15));
}
return n;} //i need for whatever "n" is to be added to my array cookie

Upvotes: 1

Views: 3504

Answers (2)

adeneo
adeneo

Reputation: 318182

The $.cookie plugin will save the array as an string, and this :

var arr = $.cookie("arr",[1, 2, 3, 4, 5, 6, 7, 8, 9]);

returns the request, something like :

arr=1%2C2%2C3%2C4%2C5%2C6%2C7%2C8%2C9

you have to first save the array, then get the string back and split it again, then you can push to it :

$.cookie("arr",[1, 2, 3, 4, 5, 6, 7, 8, 9]); // set the cookie

var arr = $.cookie("arr").split(',');        // get the string and split it

arr.push(pri()); // then add whatever the function returns

now you can save the modified array back in the cookie

$.cookie("arr", arr);

Upvotes: 1

Halcyon
Halcyon

Reputation: 57719

Values in cookies can only be strings so use a (un)serializer.

JSON works fine in JavaScript:

$.cookie("key", JSON.stringify([ 1, 2, 3]);

Usage:

function add_value(new_value) {
    var value = JSON.parse($.cookie("key")); // unserialize
    value.push(new_value);                   // modify
    $.cookie("key", JSON.stringify(value));  // serialize
}

Upvotes: 0

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