Array filter chaining for a basic "rules" implementation.... (not run this code, so might have errors, but you get the idea)

gistfile1.js

var items = [
  ...
];

var satisfied = items
  .filter(condition1(5))
  .filter(condition2('camel'))
  .filter(condition3)
  
function condition1(something) {
  return function(item) {
    return item.value > something;
  }
}

function condition2(animal) {
  return function(item) {
    return item.animal === animal;
  }
}

function condition3(item) {
  return item.alive === true;
}