Question

var send_value = [current_site_id, current_site_name, current_site_description];
console.log(send_value);
send_value = jQuery(this).is(':checked') ? send_value.push('add') : send_value.push('delete');
console.log(send_value);

The result is

[“12”, “qwrqweqwer”, “qwreqwr”]
4

Where i’m wrong?

PS.
Sorry, my mistake was in send_value =, can not understand how it got there

Answer 1

This line send_value = jQuery(this).is(':checked') ? send_value.push('add') : send_value.push('delete'); assigns the return value of push to send_value, it doesn’t push anything. The return value is the new length of the array object, as you can see in the specifications

Try this:

send_value.push(jQuery(this).is(':checked') ? 'add' : 'delete');

Push the resulting value of your ternary
If you find it more readable, you could turn your ternary into an expression, rather then a statement:

(jQuery(this).is(':checked') ? send_value.push('add') : send_value.push('delete'));//<-- notice surrounding parentheses

But, frankly, if your concerned about readability, it’s best to do away with ternaries all together IMHO.