json对象的特定索引

Question

How do I make an array of 3 selected elements of a json object so far: Json object returned from mysql, php into an array of arrays tested true as array

var json = $.parseJSON(data);
$(json).each(function(i,val)
{
 $.each(val,function(k,v)
{
 console.log(k+" : "+ v);

console displays

0 : 2013-03-28 20:18:05

1 : THE MURC THEATRE

2 : COMEDY

3 : -37.001732

4 : 174.789467

5 : -36.998543

6 : 174.787339

7 : 47

8 : 1

9 : 9

10 : 0.00

11 : 1.00

0 : 2013-03-28 20:18:05

1 : DOWNTOWN THEATRE

2 : DRAMA etc etc

Assuming php gave these numbers as keys, when i try to reference them using alert (data.'3'[4]); or alert (data.3[4]); I get unexpected number/unexpected string errors. I just want the 1st 3rd and 4th items from each iteration to be stored in a variable, how do I reference this ?

Answer 1

data.'3'[4] and data.3[4] are both invalid JavaScript syntax. The correct syntax is still data[3][4] (or perhaps more accurately data["3"][4] . You can use bracket notation to access object members even if the keys are numeric.

Answer 2

You are dealing with a multidimensional array structure:

data[x][y]

Replace x and y with desired indexes.