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json javascript array question about array referance

Hi,

I am using JSON and eval to get an array of objects, like this:
{"location":[ {"loc_id": "76",
"description": "test",
"company": "testrco",
then eval in javascript so var loc = eval........

The loc_id is a unique no., can i use this as the array no? I want to add to the array and change some of the values "description" for example would be god if i could reference it like
loc.location.loc[76].description instead of loc.location[2].description where the 2 doesn't relate to anything.

Hope I am making sense....

Thanks,
Ewan

moagrius

natively, no - 76 is a value, not a key. however, you could write a simple loop to create an array for reference and assign key by loc_id

var list = [];
for(var i=0;i<loc.location.length;i++){
var ref = loc.location[i];
var id = ref.loc_id;
list[id] = ref;
}

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ewan69

ASKER

Hi moagrius,

Thanks for the quick reply, sorry for not using the right terminoligy, still learing....

I will try your code in a minute thanks, is there a better way of doing things?

I want to be able to periodically update the array elements from a database so i was thinking if the PRIMARY KEY value was used as the array key, using eval i could easily replace the old element with the new.

Is there a better way of doing it?? maybe loop through the array and see if loc.location[i].loc_id == the loc_id of the update, if it does then replace that element with the new one.

not sure if element is the right word, i mean one of the whole objects in the array.

Thanks,

Ewan

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moagrius

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ewan69

ASKER

Thanks for your help... :)