compare to arrays of objects, return only the difference

say-youll-be-there.js

// Finding the difference between to arrays of objects
// As told through the magic of...
//   _____       _             _____ _      _     
//  / ____|     (_)           / ____(_)    | |    
// | (___  _ __  _  ___ ___  | |  __ _ _ __| |___ 
//  \___ \| '_ \| |/ __/ _ \ | | |_ | | '__| / __|
//  ____) | |_) | | (_|  __/ | |__| | | |  | \__ \
// |_____/| .__/|_|\___\___|  \_____|_|_|  |_|___/
//        | |                                     
//        |_|  

const beforeSpiceWorld = [
  {name: 'Ginger', isMember:true},
  {name: 'Baby',   isMember:true},
  {name: 'Posh',   isMember:true},
  {name: 'Scary',  isMember:true},
  {name: 'Sporty', isMember:true}
]

const AfterSpiceWorld = [
  {name: 'Ginger', isMember:false},
  {name: 'Baby',   isMember:true},
  {name: 'Posh',   isMember:true},
  {name: 'Scary',  isMember:true},
  {name: 'Sporty', isMember:true}
]

// 2 Become 1
const whoRuinedEverything = AfterSpiceWorld.filter(after =>
  beforeSpiceWorld.filter(before =>
    before.name === after.name && before.isMember === after.isMember
  ).length === 0
);

console.log(whoRuinedEverything);