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I have a nested data structure / JSON, how can access a specific value?

I want to iterate through a json object which is two dimensional ... for a one dimensional json object I do this

for (key in data) { alert(data[key]); }

what do i do about a two dimensional one??

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  • 2
    Could you show us data ? Commented Nov 24, 2012 at 19:07
  • How to iterate through a json object? it would be easier having the data in front of my face Commented Nov 24, 2012 at 19:08
  • see this stackoverflow.com/questions/2488148/… Commented Nov 24, 2012 at 19:08
  • 2
    2 dimensional can mean numerous things... a little extra effort when posting questions would help. Also , doing a little searching would have likely given you your answer Commented Nov 24, 2012 at 19:08
  • if i alert(data) i get [object Object],[object Object] .... i get the desired output when i type alert(data[0][1])..but i want to alert all the elements ... Commented Nov 24, 2012 at 19:15

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There is no two dimensional data in Javascript, so what you have is nested objects, or a jagged array (array of arrays), or a combination (object with array properties, or array of objects). Just loop through the sub-items:

for (var key in data) { var item = data[key]; for (var key2 in item) { alert(item[key2]); } }
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+1 not bad, caching item ;-)
it works but am getting the output twice ....
i get data[0][1] then data[0][2] , data[0][3] then again i get data[0][1], data[0][2], data[0][3] ... then data[1][0] and so on ...
2

perhaps you want

for(var i in data){ for(var j in data[i]){ alert(data[i][j]); } }
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Try:

for (var key in data) { for (var key2 in data[key]){ alert(data[key][key2]); } }
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