I've been looking all over stackoverflow for something to help me implement an AreaChart. The problem is that I have something like this.

var items = new Array();
if ($(result).find('dato').length > 0 ) {
  items = ["Date", "Kg Emitted", "Kg Reduced"];
  $(result).find('dato').each(
    function (i) {
      var item = new Array();
      var date = $(this).find("fecha").first().text();
      var kge = parseInt($(this).find("emitido").first().text());
      var kgr = parseInt($(this).find("reducido").first().text());
      item = [date,kge,kgr];
      items.push.apply(items, item)
    }
  );
};

The problem is that I need it in a format like:

items = ["Date","Kg Emitted", "Kg reduced"], [2013-01-01, 3, 4], [2013-01-02, 1, 3], etc

I would appreciate any help on how to format this nested array, because so far I've tried items.push.apply(items, item), but it doesn't seem to work.

I've been looking all over stackoverflow for something to help me implement an AreaChart. The problem is that I have something like this.

var items = new Array();
if ($(result).find('dato').length > 0 ) {
  items = ["Date", "Kg Emitted", "Kg Reduced"];
  $(result).find('dato').each(
    function (i) {
      var item = new Array();
      var date = $(this).find("fecha").first().text();
      var kge = parseInt($(this).find("emitido").first().text());
      var kgr = parseInt($(this).find("reducido").first().text());
      item = [date,kge,kgr];
      items.push.apply(items, item)
    }
  );
};

The problem is that I need it in a format like:

items = ["Date","Kg Emitted", "Kg reduced"], [2013-01-01, 3, 4], [2013-01-02, 1, 3], etc

I would appreciate any help on how to format this nested array, because so far I've tried items.push.apply(items, item), but it doesn't seem to work.

• javascript
• arrays
• format
• nested
• concatenation

• I forgot to mention. This each method is getting an ajax with an xml formated var that contains fecha, emitido and reducido, which is date, Kg Emitted and Kg reduced – Joaquin Commented Jun 11, 2013 at 14:47

3 Answers 3

Everybody gave you the right answer here, i want to add just a little fix, the first value in your array is incorrect and is actually 3 rows.

See the difference in this fiddle

you need to add another [..] .

Just change items.push.apply(items, item) to items.push(item).

When you use apply like that you are effectively doing the same thing as Array.prototype.concat.

Your initialization of items isn't setting it up as a nested array. Element 0 is "Date", 1 is "Kg Emitted" and 2 is "Kg Reduced".

You want to start it with

items = [["Date", "Kg Emitted", "Kg Reduced"]];

This will instead make Element 0 of the array be ["Date", "Kg Emitted", "Kg Reduced"], which is what you say you want.

Then, as others have already said, change items.push.apply(items, item) to

items.push(item);