Generic Filter Function

[JasonWarrenUK]

Create a function that like this...

function listFilter(property, value, /*optional*/ instruction) {
  //Updates displayed list to obey new instruction 
}

An example would be that...

function listFilter(status, complete) {
  //Display only completed items
}

function listFilter(status, complete, add) {
  //Add complete items to current display
}

function listFilter(status, complete, minus) {
  //Remove complete items from current display
}

function listFilter(status, complete, not) {
  //Show everything that isn't complete
}