Copying and pasting one inputs value into other input with the same name

I am trying to write something that will copy the current `s value and enter it into any that start with the same name.

names will follow this pattern: price-0, price-1, price-2, upc-0, upc-1, upc-2.

So if a user enters a value in and hits copy the value should be transferred over to all input whos name start with price`

This is the code I've written:

$(document).on('click', '.--copy', function () {
    var input_name = $(this).closest('div').find('input').attr('name').split('-')[0];
    $('input[name^=' + input_name + ']').val($(this).closest('div').find('input').val());
});

A fiddle to make everyones life easier: http://jsfiddle.net/6jGLD/

I feel like there are too many selectors being called upon and the code is somewhat difficult to read.

Why not at least save the intermediate to avoid rerunning that:

$(document).on('click', '.--copy', function () {
    var obj = $(this).closest('div').find('input');
    var input_name = obj.attr('name').split('-')[0];
    $('input[name^=' + input_name + ']').val(obj.val());
});

StackExchange Code Review Q#33213, answer score: 2