example filter function wih array

filterFunction.js

var animals = [
  {name : 'artur', food: 'potatoes'},
  {name : 'sergey', food: 'fries'},
  {name : 'anton', food: 'fries'},
  {name : 'petya', food: 'cream'},
  {name : 'oksana', food: 'chips'},
  {name : 'lesya', food: 'meat'},
  {name : 'julya', food: 'vegies'},
  {name : 'sasha', food: 'sour_cream'}
];


var fries = animals.filter(function(animal) {
  return animal.food === 'fries';
});

console.log(fries);