Getting lastIndexOf on a Dropdown

Question

Here's my attempt to get the last item in the dropdown and check it:

if (day.lastIndexOf(day.length) == 28) {

..do something

}

day var is set to reference dropdown control. Obviously I am not doing this right. How do I know where I can apply lastIndexOf on a dropdownlist? How do I get at it's array? I tried this also but it doesn't work, syntax error:

day.options.lastIndexOf(day.length)

one would think that should work, options is an array of values I think..has to be.

Answer 1

Try:

day.options[day.options.length-1]

Answer 2

coffeeaddict,

The lastIndexOf() method returns the position of the last occurrence of a specified string value, searching backwards from the specified position in a string.

You're probably trying to do this:

if (day.options[day.options.length-1].value == 28) {
...
}

Answer 3

var o = day.options;
var option = o[o.length - 1];

Note that option is an Option object with text and value properties that you can use for your checks.