Question

How do you make a JavaScript function have a false option, which makes sure the function doesn’t execute?

Here’s the code:

    function deleteExtraRows(tableID){
        tableID = '#'+tableID;    
       $(tableID+' tr').each(function(){
            if($(tableID+' tr').length>1){
                $(this).remove();
            }
        });

    }

I want to also be able to give it a (false) option, so I can run deleteExtraRows(false), which will not make the function run. I know this seems kind-of backwards, but it would fit in the project I’m working on if I can do this.

Please help!

Answer 1

This should do the trick:

function deleteExtraRows(tableID){
    if(tableID === false)
        return;
    ....
}

It is important to use === as opposed to == since === checks the type as well. If tableID were 0 or an empty string, it would evaluate to true and return as well.