Question

When I add an element of type input=text named name="algumacoisa[number]".

I need to sum ​​the values ​​each time you add an extra field.
Using the .each() appears not work, because it not see the field $('[name="algumacoisa[]"]').each() to count how many fields there and sum their values​​.

Any idea?

Any help is welcome.

Thanks

Answer 1

var sum = 0;
$(':input[name^="algumacoisa"]').each(function(){
   var value = $.trim( this.value );
   if( $.isNumeric( value ) ) {
      sum += parseInt( value, 10 );
   }
});

About $.isNumeric().

You can also use a function for this:

function getSum() {
    var sum = 0;
    $(':input[name^="algumacoisa"]').each(function() {
        var value = $.trim(this.value);
        if ($.isNumeric(value)) {
            sum += parseInt(value, 10);
        }
    });
    return sum;
}

DEMO

According to comment new demo.