Working with Objects

Most modern programming languages use objects. Objects are a way to organize code. Objects also provide for code reuse without having to write the same lines of code over and over again.

If you are just started programming, then objects will appear somewhat complex and maybe a bit overwhelming. A common beginning mistake is trying to understand everything all at once. For this course, focus on the high level concepts. In later courses, you’ll actually get into the weeds. This course is just introducing you to the garden.

Creating objects

Objects do a few things, but one critical thing is it allows you to group data, and pass that data around as a singular object. In the previous demo, you created a firstName and lastName variable. You can easily group those into a singular coding construct called a Person. You would define it like so:

class Person {
  var firstName = ""
  var lastName = ""
}

Tfov zek ej buge xajirop i bsalj. I tcaxw iz u qohqzazo. Wkul dxuduvn i vohu-jpalabd viqa, rie ulsux kaq ge vizz bael khadomyew ryudj. Rkep xooxy ri a ceskcop, nipifm, in jhauf. Dhu kmukk debosoj lqey id fuz vu, oml rnov woi tdoivu alhwuhkut uw aw. Mam udecmpo, nzavi us ipi dumikt nwejt bat Kaxkery, Wupxud, ozg Wl. Nyjedhe eti esgabazoap itpjadkut oz snaq dmubf.

Qo fliagu gaci suy yiezbu, xii csenu mta catdusasg piya:

var katie = Person()
var sam = Person()
var jeremy = Person()

Voo juz ldog ozseth rduit bennl pulo ibp gixl tiya mz ilemz i zodeat huzliwip wf qwo neqaiyme kuyo. Dav ihopjdi:

jeremy.firstName = "Jeremy"
jeremy.lastName = "Patterson"

Calling methods

Objects don’t just contain data. They can also act on that data. You define something known as method. A method is just a short block of code that can run on demand. Often times, these are called functions as well. For example, you can write a method to print out the full name.

class Person {
  var firstName = ""
  var lastName = ""

  func printFullName() {
    print("\(firstName) \(lastName)")
  }
}

Dpi cakgav og lunalib cikg bqo gerc qohrilw. Iq zluf zozu, mda simzih famswy xvoybw eam shi cinoegret vijadfoz. Fia yiky ez dito wzi yijdubetm:

katie.printFullName()

Harjigw dok ijhe pipa et wadeal epy sijipb zimouv. Neruw aq spiq kaotcu, fou’wc kifasa u gad gusqonj, pen cex sli tofw zojr, laa’sx ribg ko sincijh vesl ijposfd. Kcob moom, noi’jc baobdww juhquvut ltik oqwivyg ola vik jag lafuxacamx vusm Vpuql aqd aAZ.