It is possible in Knockout to bind custom parameters to a call in JavaScript. I believe this is intrinsic to JavaScript. It also kind of reminds me of currying though at the moment I am not entirely sure.
For example, suppose you wanted to call myFunction with some parameters besides event and item (because those are what you get normally by Knockout). I need to do this because I want a callback after the click event. So here is my function:
var myFunction = function(callback, data, event) {
//value of "this" would be $data
};
click: myFunction.bind($data, myCallbackFunction);
The first argument to "bind" is the context (value of "this") that
you want the function to execute with. Any arguments after that will be
passed to the function prior to the actual arguments.
Data and event are always passed after any extra arguments that you provided to "bind".