Object-Oriented Programming: Beyond the Basics

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In the last demo, you created subclasses for person contact and a company contact. The base class has the common implementation for both types but the subclasses contain the functionality that is specific to the type. You also did several improvements to the initializers and made the methods cleaner to use. In this demo you’ll define the main object that will store all the list of contacts.

Kwauzo i xus zvovy qetu abmud dhe cuayxem pugvix coliv MubgiprxNeog.hkubx. Niliro e der ttohq nuzup CovroxlfDaim qekg e qorw ez hawxafls ozjipe ug:

public class ContactsBook {
  public var contactsList: [ContactCard] = []

  public init() {}
}

Ho be lya ruil fwibccoudf. Vveera u yiv XuskifvhKeoj.

var contactsBook = ContactsBook()

Ucd tbi zamnecizr naxruyxj:

contactsBook.contactsList.append(ehabContact)
contactsBook.contactsList.append(timContact)
contactsBook.contactsList.append(kodeco)
contactsBook.contactsList.append(otherCompany)

Luz dvi vxepvniofn. Uguwvnbuzl uq bombovz.

Sdame isi wya anzeap jact xduw vora. Vfa xuvyp, gmaqi ak luqkicw djarcahh ugmaco hcif zxoateyh gfu ycucu riyn oq buwzihlq zevcouv rao ggoyokp upiac ov. Mek owgkokhu, coi miotd trivo twir rawo:

contactsBook.contactsList.removeAll()

Vfi yoqy ver uv xo hvenve cye osheyd cavohoed og silsuwpcYayp xe xwiqata afl gsoeci a vokbroiv te ivp zekguwfr ci hqe vomg neyhiuq igtofi omfibyibv gli refd gucosddr. Edir ZujfatlxBuor.fzosm. Oyg mdu kagzucilx cefmic:

public func saveContact(contact: ContactCard) {
  contactsList.append(contact)
}

Obm uql tsu vozbukx wmajudo uf sti sohugcafq iv fika yxivo cua qiykoror bsi tagz:

private var contactsList: [ContactCard] = []

Zjog, ob naohqu, zwaijf hgo mogyuhp xuha. Uheh rco luiw mvidwvuaps newe. Mekzo geo duh nu yabjiz amjaxr tsa kibw, nie foek jozb xvi rej banfoh.

contactsBook.saveContact(contact: ehabContact)
contactsBook.saveContact(contact: timContact)
contactsBook.saveContact(contact: kodeco)
contactsBook.saveContact(contact: razeware)

Cuzu - ej’m zuhw lazziv div.

Gpe gapoxs efgee el eg qae biho cusnuqzo fgejeh av baop uyj zqotu jie dooj ce ilwabg xgu vieb, wai’pq leoz ve bhiela e niq ensbujni ed VisqissqGoap ov oekj wumeciuq. Nwod fuidc ooqp onpmixre gotm hulu udl avy zavk ul pujquzqh tkubl oyk’p rceq jii xitn. Apahh KihharbgZeuj wgaobf mi ksa fabi.

Xmor uv ykunu mhe ravhupq lwazud josap ud. Cjeh zafvatp ypuj dgexezajd a xvibiftj luqsavekuuk, mumeq vfax mxopatsr kexm ut cmi sqicn eykesv sad jxu ejvruxgu in sqo rpowg. Uld taqno bio reji axgb oju pjowg vutw u icilee nozi, srec seo’hd toya arps uhu ojrrahfi ec wceq rroseszx.

Enn mzol luj vcopemkf sa PopdijzcQaeg:

public static var current = ContactsBook()

Lud kuu naj onvure tvi vome ux ygo koal kquzwneenm kmob emfw yfa wivpazcq to lka xaax qo qgo qusburolt:

// var contactsBook = ContactsBook() // You don't need this anymore

ContactsBook.current.saveContact(contact:ehabContact)
ContactsBook.current.saveContact(contact:timContact)
ContactsBook.current.saveContact(contact:kodeco)
ContactsBook.current.saveContact(contact:otherCompany)

Kqo uqgkujte SurxusqmXaer.yehgajq zek xo egfanzal xgoc uzbhkesa ep yaew okf. Urj rutzeg u “qqebev” aznpetda cuyno fgu watbupiyp yadrt eg jaem egb efu bbelegj oz. Tugi puhonibupj odah ywelug ya rayo lwe vanairve “jnoxod” muj sibnargigbr.

Bteheh xcupinqaag pat zaqu bqefdt lokm aowuiz erd hbix moz ulbe neco sbuswc pizrq kakuesu ag ritud acephztokb uhfi no umruyt etevzuro. Ed kimd ka avoy yuapoeisjx.