Question

I’m having some trouble with checking if a value is not in an array. I’m trying to allow only certain key presses in a textbox.

Here’s what I have:

var keyCodeArr = [ 8,9,13,17,18,37,39,46 ];
$('#txtSearch').keydown(function(event) {
var code = event.keyCode;

if (!$.inArray(code,keyCodeArr)) {
    event.preventDefault();
}
});

It’s allowing anything in the textbox. I looked at the documentation for $.inArray(), which show an example for seeing if a value is in an array, so I thought just adding the NOT in front of it would do the trick.

Or is it that I’m not initializing the array correctly in the first place?

What am I missing?

Answer 1

Using jquery:

if (!~$.inArray(code,keyCodeArr)) {
    ...
}