IDE suggests the code, but I cannot understand

Asked May 09 '17 at 11:45

Active May 09 '17 at 11:49

Viewed 39 times

I have a JavaScript code like as follows

   if (jQuery("#" + formId).valid()) {
        status = true;
   } else {
        status = false;
   }

If my form is valid according to jquery validation then the status will be true else it will be false. So far it is fine.
IDE suggests to code like

status = !!jQuery("#" + formId).valid();

Can someone explain me what does this do? If it is correct how? I have tried to understand but unable to make it.

asked May 09 '17 at 11:45

Pavan

The double she-bang is useless – Vivick May 09 '17 at 11:47
1

Just use `status = jQuery("#" + formId).valid();` – charlietfl May 09 '17 at 11:48
3

`!!` is used to first coerce the value to a boolean (assuming it wasn't already) and then invert it. As `valid()` is already a boolean, you can remove that operator and just use `status = $('#' + formId).valid();` – Rory McCrossan May 09 '17 at 11:48
got it. Thank you so much. – Pavan May 09 '17 at 11:53

0 Answers0