ES6 Article

es6_11.js

// Filter function to check what property was left null.
// notNullArray is now a an array with key whose values are not null
let notNullArray = arrayWithNulls.filter((prop) => {
  // prop is an an element of the array (eg. {image: null})
  for (var key in prop) {
    // if the value of prop[key] is not null return it.
    // eg. (key = image, and prop = { image:null } Won't return.
    if(prop[key]){
      return prop;
    }
  }
});