Stock a JS array in NKSettings ?

[raf69]

Hi everybody,

I want to create a global array that i can manipulate in all JS scripts pages... This is the array structure :

myArray = new Array();
myArray[i] = new Array(2);
myArray[i]["id"] = id;
myArray[i]["title"] = title;
i++;

So, i thought about the NKSettings class. Did I think well ? ^^

I tried this :
...
settings.setValueForKey(myArray, "array");
var my_array = settings.getValueForKey("array");
NKLog(my_array);

I got a JSON object (?) :

"9":{"id":944,
"title":"l’iPad explose les records de vente",
etc...

But now, i don't know how to use it... I tested :

NKLog(my_array[0]); >> "{"
NKLog(my_array[0].id); >> undefined
NKLog(my_array["0"].id); >> undefined
NKLog(my_array["0"]["id"]); >> undefined

How can I get my array ?

I'm little bit frustrated... I need help

[ueilat]

But the value of var i when you declare the array is 0 or 9?
According to the log seems 9.
Try reading [9] or using a loop for each

[raf69]

The value 9 correspond to the 9 th value in the array. So, it could be 0 or 4... For instance, a sample of NKLog(my_array); :

"0":{"id":394,
"title":"l’iPhone 4",

So, How can I get those values ?

Sunny ? Can you help me ? :p

[ryubr]

Hello,

Try using the eval function from javascript, it will interpret the json code real time and then the object will be available, json is much better than array to store data and you can "read" it as an array too.

Try this:
settings.setValueForKey(myArray, "array");
var my_array = settings.getValueForKey("array");
if( my_array != "(null") )
{
my_array = eval(my_array);
}

Now you should have my_array["0"] and my_array["0"].id available

[sunny]

Code: Select all

<script>

var settings = new NKSettings();

var id = 0;
myArray = new Array();

for (i = 0; i<10; i++, id++)
{
   myArray[i] = new Object;
   myArray[i]['id'] = id;
   myArray[i]['title'] = "Item #"+id;
}

saveArray();
printArray();

function saveArray()
{
   settings.setValueForKey(myArray, "array");
}

function printArray()
{
   myArrayNew = settings.getValueForKey("array");
   
   for (i = 0; i<myArrayNew.length; i++)
   {
      NKLog(myArrayNew[i].title);
   }
}

</script>

The output is this:

2010-07-29 18:19:58.355 settingsTest[13321:207] Item #0
2010-07-29 18:19:58.358 settingsTest[13321:207] Item #1
2010-07-29 18:19:58.359 settingsTest[13321:207] Item #2
2010-07-29 18:19:58.361 settingsTest[13321:207] Item #3
2010-07-29 18:19:58.363 settingsTest[13321:207] Item #4
2010-07-29 18:19:58.364 settingsTest[13321:207] Item #5
2010-07-29 18:19:58.366 settingsTest[13321:207] Item #6
2010-07-29 18:19:58.367 settingsTest[13321:207] Item #7
2010-07-29 18:19:58.369 settingsTest[13321:207] Item #8
2010-07-29 18:19:58.370 settingsTest[13321:207] Item #9

[ueilat]

You didn't test the only one correct that is
NKLog(my_array[0]["id"]);

in any case test this code and you will see that it works

Code: Select all

myArray = new Array();
myArray[1] = new Array();
myArray[1]["id"] = "x";
myArray[1]["title"] = "y";
myArray[2] = new Array();
myArray[2]["id"] = "w";
myArray[2]["title"] = "z";
   
var settings = new NKSettings;
NKAlert(1,myArray[2]["title"]);
NKAlert(2,myArray[1]["id"]);
   
settings.setValueForKey(myArray, "array");
var my_array = settings.getValueForKey("array");
NKAlert(3,my_array[2]["title"]);
NKAlert(4,my_array[1]["id"]);


[raf69]

Thank you very much for all those answers !

I have 3 solutions so I will try it tomorrow. Sunny, what is the most efficient ?
- create an object (like in your example)
- use the eval() function
- my_array[0]["id"] (that seems to be the easiest solution)


Thx again !!!

[raf69]

Huuuum... I really don't understand... So, I try your code Sunny in a new project, it workes well. But, in my project i've got this result :

var NEWS = new Array();
var settings = new NKSettings();

for (var i = 0; i <10; i++) {

NEWS[i] = new Object();
NEWS[i]['id'] = i;
NEWS[i]['title'] = 'title'+i;
}

NKLog(NEWS);
settings.setValueForKey(NEWS, "array");

var myArrayNew = settings.getValueForKey("array");
NKLog(myArrayNew);

output :

>> [object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
>> {"0":{"id":0,
"title":"item0"},
"1":{"id":1,
"title":"item1"},
"2":{"id":2,
"title":"item2"},
"3":{"id":3,
"title":"item3"},
"4":{"id":4,
"title":"item4"},
"5":{"id":5,
"title":"item5"},
"6":{"id":6,
"title":"item6"},
"7":{"id":7,
"title":"item7"},
"8":{"id":8,
"title":"item8"},
"9":{"id":9,
"title":"item9"},
"each":,
"eachSlice":,
"all":,
"every":, etc...

What's wrong with my code ? : / The output looks like a JSON structure... and not an object

Else, I tried the eval() function :

var myArrayNew = settings.getValueForKey("array");
myArrayNew = eval(myArrayNew);
NKLog(myArrayNew[0].id);
NKLog("test");

I think that there is an error with the eval function because i don't have any output after using it.

[Big-O]

What is that the output of? I don't think you're showing us all the code.

[ryubr]

Hello,
The correct syntax for the eval function is this:

var myArrayNew = settings.getValueForKey("array");
eval("myArrayNew =" + myArrayNew);
NKLog(myArrayNew[0].id);

That way the eval will be parsed just fine and the json converted to a javascript object