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up vote 1 down vote favorite

I have the following multidimensional array setup:

array[key1][key2]["value1"] = "test";
array[key1][key2]["value2"] = "test2";

I know to iterate in the first level you use:

for(key in  array)
{

}

How would I iterate through the second level? I was trying this without any success

for(key in array)
{
    for(key2 in array[key])
    {

    }
}

Also, does anyone know how I can sort by the second key? I hope I'm not overcomplicating this

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1 Answer 1

up vote 2 down vote

for..in is for iterating through object properties, read more here.

var array = [
  [1,2,3],
  [101,102,103]
];

for (var i=0; i<array.length; ++i) {
  var subArray = array[i];
  for (var j=0; j<subArray.length; ++j) {
    console.log(subArray[j]);
  }
}

You can also do this in modern browsers where forEach is available:

array.forEach(function(item, i) {
  item.forEach(function(subItem, i) {
    console.log(subItem);
  });
});

Live demo (click).

Regarding sorting, you would have to be more clear on what you want sorted - what goes in and what you want out.

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