swift filter array
var users: [User] = [] users.append(User(name: "testUset", age: 43, hasPet: true, pets: ["cat", "dog", "rabbit"])) users.append(User(name: "testUset1", age: 36, hasPet: true, pets:["rabbit"])) users.append(User(name: "testUset2", age: 65, hasPet: true, pets:["Guinea pigs", "Rats"])) let petArr = ["cat", "dog", "rabbit"] users = users.filter { $0.pets.contains(where: { petArr.contains($0) }) } // The first $0 is from the filter and it represents each User. // The second $0 is from the first contains and it represents each pet within the pets array of the current User.
