how to use $.makeArray() with jQuery

Question

Can anyone explain me how to do this, jquery's api is really lacking on this. What is wrong in the following code?

   var arr = $(value).filter(function() { return $(this).is("TD"); } ).html();
   alert(arr[1]);

I just want to grab the innerHTML/text of the td and put it in an array

Answer 1

Using .map() with .get() is one way to go:

var arr = $(value).map(function() { 
      var $th = $(this); 
      if($th.is("TD")) return $th.html(); 
}).get();

alert(arr);

I'm not sure what value represents, but if you change the selector to match only td elements, you could simplify the return statement with return $(this).html();.

.map() iterates over the elements, and adds the return value to the jQuery object. .get() retrieves just the array out of the jQuery object.

• http://api.jquery.com/map/
• http://api.jquery.com/get/

---

Sounds like value is a tr. Then you could do this:

var arr = $(value).children('td').map(function() { 
      return  $(this).html(); 
}).get();

alert(arr);

---

To create an array with each item containing an array of that row's td element's html, you could do this:

var arr = [];

$('tr').each(function() { 
    arr.push($(this).children('td').map(function() {
        return $(this).html();
    }));
}).get();

console.log(arr);

This uses the standard .push() since I don't think that using .map() inside .map() would work. I think when you pass the inner array into the jQuery object, it just adds it to the main array (or something).