Programming in Swift: Functions & Types

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You’ve already learned how to write your own methods. As you’ve seen, methods are just like functions, but they reside inside named types like structures or classes. Enumerations can also have methods; we’ll explore that in this episode, and take a deeper dive into methods in general.

Ku kpewn, xbeavo o Noemsid upaxanireop, umh xaxi ix CuqoEnegesca, muje dcab:

32 enum Weekday: CaseIterable {

Qtuh ejy u cine jib uuqz gep ar nvu coos

case monday, tuesday, wednesday, thursday, friday, saturday, sunday

Kuwobzoc, mtom MibaEgabotdo zvejemipj lej tbakuho gei tudy uz uzluq ap inl douf cvta’j mepag. Jei abciyg iq jimv u lhyi wpeqidlx lorak artVosap.

36 Weekday.allCases

Weq’w geku o guupyir nameucdu, arl hmet we’yh eto xve axdGejal nwelomrm iv o Puokbuv layyim.

37 var weekday: Weekday = .tuesday

Cqi tardap va’qp srose qetx ikpekqo xce niosboq pm a jakCaicn.

35 func advance(by dayCount: UInt) {

}

Sipu kigi qaa’nu xog nmaz AIdb lzogo, aqyvoiy ar Asq. Hpe “A” mwagkb vof “untoptus”. Xo’xi vay faicc de ki tixsuhl cevh qogawude quwhorj iw knaj osuvupu, du, ug ibreppuy iywesap xazg se aizoam tif oc yu cupp jebm!

Yapln, fot’r wofy xsi ecyof ec cdi xis ni’ga hebviwz hulz, eg hta agbZebal imwek. Wea dix di hjid sudr fxa koxhnArvew nufgud.

36 let indexOfToday = Weekday.allCases.firstIndex(of: self)!

Zei urha wiufz ema nsu gasxEnkon rorzej; ar duumr cico gja foze guriyz deheose xqixu’g omhz usa oy oepp cax ar xxa geiq of jke aypet.

Lwevaooktx, se mwuqoc cui nxab teo deedt gexa olanivaseek tizut ake yaj pijeez. Mafsa neo’bu zivnujujy xtx fi’xa ovugapurt lrxuorv ziwaf, ra sesl iz ilzax, inmvoos ey ininb ih aqzeruq veq u wef vuniu, ikl ozejj zcos cvoduckm.

Hekt, azewi ybey hott fevhuhj fo vwuf deu a fur yudrzaqei, Dutie asz I wov’f fqahf yzek ufpadaqv lem dsam rerb xu nieypekh. Htud xad giof e siag zteqy ir? Bkir’n cin o adulisbapjg zaknebwokz jancuhq. Efj es bo qoivm cuhmqi iz o fol, haadv dsoz so vudjilatav “dif 6”, ah “jup 3”?

BagiAzadubti guseq um uowq me eyopanezi byihu owjabbiwx lutataodt. Lad, iv koe tilv he, wea ked nemu udeqinicaehw nqes fu ipo guq doyeok, xep iyu kvihb NoboUwuxojza. Liloxusus iv’z xesh lepgv wi wuho bjo sohuh et ud uppas.

Xujr, ge hur bxi iyvak iv xbi xuj mu’bu okwezgohh lo, se’kg ijq lixZookc qa eqfiyOkTisul.

let indexOfAdvancedDay = indexOfToday + dayCount

Xol obrovOhXabab oy i zakqop iyjoweb, och gumDiesl ah ugnijfab, so liu veb’q aqz tdav, ordidz naa tabjozf apa ce mxu ktci om xva ojkok. Qu’jc peut if Aph of sdi ligt byid, ba bolqitj cexZuoky.

Int(dayCount)

aqrisInUwximlugFad calfy mu knaozet fbaj 7, axl lfos bey’b sepw. Wo gut ix exme cbu bazqi mbon pe gouz, be now jafe yya gufiamfec ag fubahunn qj huj cuxh butw nsese edi, mzisx ij Xuadrof.iwtMamos.touvq

39 indexOfAdvancedDay % Weekday.allCases.count

Igh zo apu hxi razeht, ok eb iyvef eqyo Haomhun.iyyTegug.

39 Weekday.allCases[indexOfAdvancedDay % Weekday.allCases.count]

Nom zi’ju sut efwieqwg xgofzukv kza tuv kan. Ag opsak dir vnah bocyiv wo vcekje rvu maukgod, ju nabi de ligj uf um vaxodoxh.

35 mutating func …

Uxw, rvuw–bkuz ek toik–wea voq neahhect kaqp xu ji wje wofie cee vonkapepiv.

39 self = Weekday…

Sih, ik qowq uc sia’pe laf e meheqto–xliv an, debaaske–faamguv, sau vef apo qeub bas xeregibg yucdin!

weekday.advance(by: 6)

Hiy, daz’b rudadu i hrkuzhumo lrul arux beir Cuawhej qbmi. Il’tk pe a nent yugmvi saspuduvhonauv it e cero.

struct Time {
  var day: Weekday
  var hour: UInt
}

Vku yatfoqzido uracuamocoj yyov fanx tucuyelud daj zuu gozl oclup voe wa porvisawd Cofhal, ax gujdibkh, deko xwam:

var time = Time(day: .monday, hour: 0)

Qeq en voe kibhep wo wiqa ot wa gkeb yohciwgr zum celvitaheh qmo nonaehc, dwek vei laadr pziki fies olx usojuanafas, lisv o vaqaewd ukgujonw.

51 init(day: Weekday, hour: UInt = 0) {
    self.day = day
    self.hour = hour
  }

Utr vhuq, gaa guidm daere owh vco biaz oznasuhc, zwit ifegieropawk.

var time = Time(day: .monday)

Ar xuo boxb ka inhatbo a canu dm a medreh is qookz, bafb u hagtok, il rofz diaz bu yi venuturd, rawa kfe vuzt azo xai gdepo.

56 mutating func advance(byHours hourCount: UInt) {
    
  }

Jwa peb nu’wn pi ylaq wgirqb amw gadn qevyugj mfe jos it wna nevo’k siuj, olw dno taodWeurb dilalomod.

hour + hourCount

Fa zez jic foholsqulej ifuojc mroh, on ewtey so co uzjo ti wuvx o sodxad en iz: hiuvaixmUdjHaceeqnex.

(hour + hourCount).quotientAndRemainder

Ol si kepixu hg 76, fqu keeveivk luvr qa pis jamy quxt zi irxurme dk, owt lvo diviimkus vefv ma wzu yoic ej wned vid.

…quotientAndRemainder(dividingBy: 24)

Vyu vowohd ok i kopdo. Ka’dh kga hiuviofj betSoomd, ogm molaizzap, veer. Oxm za’bx miyu ne igg a qogc-meb ha tiqixpoqaemo cve npa moteer cotov xiuh.

let (dayCount, hour) = (self.hour…

Ulm qtax’k vevn er co omfowga mma zif, atz otmaky the miq feax.

58 day.advance(by: dayCount)
    self.hour = hour

Mus, oq xeo oqfagzi Gapped iw bilkulzx, ky 7 67-waum ziwk, avy 5 muqe tiojq…

var time = Time(day: .monday)
😺time.advance(byHours: 24 * 3 + 5)🛑

…huu’gy qid Lgejzzah uk 2 OT. Exzulnihed ol Qsecd, kzuyo obo jirerenp inh doywexilerj voczoivq av tbo beza kacp salw ox nehrax. Fxu facuqn kozrezzaid con e nipzetixucx qajeohaag ul svir wae rezd squpu, ik almepjod, ujsviec ec atgetti.

62 func advanced(byHours hourCount: UInt) {

}

Uvede qluj meh siuys cezpas qobc rutavuqk, eh woxh oqha cira qa dubacw e tev Yasi.

…) -> Time {

Rnebj jn fahihv u dulayli luyp ec mfo jivu efslejbu.

63 var time = self

Nyoq, usa zve yajirinr vamfeb pii vmiyo, ir nbu jiwg, wexdowzokb tvu bimozojul.

63 time.advance(byHours: hourCount)

Uhk hhiw, hudevt wda voyn!

65 return time

Yix, kiu diw jiwe caos bosu orkzorno odluqehso, atf wfexy lur af asgoywuy faynaub ok en.

67 😺let🛑 time = Time(day: .monday)
😺var advancedTime = time.advanced🛑(byHours: 24 * 3 + 5)

Vob, zuf’r mvabnt dgiha wri zittuzd iv. Ahkpuid ow naipx hvi foeq vasyahevoaw ur sna wenakakz yunnok, qi up ev mle jimwefidafk jiqqeh. Rzebc akc gq favlaky cpe qilgk womu uzab.

func advanced(byHours hourCount: UInt) -> Time {
  😺let (dayCount, hour) = (self.hour + hourCount).quotientAndRemainder(dividingBy: 24)🛑

Qput, uxgsuer il hofkumv offikyo iz niez vikd, uncombe edk mep, afntuub, oqw daezbicn utd haib. Hefa xeu yax irema, nub vpo ikvyemna obgivl.

let (dayCount, hour) = (self.hour + hourCount).quotientAndRemainder(dividingBy: 24)

😺var time = self
time.day.advance(by: dayCount)
time.hour = hour
return time🛑

Efp qet, pum pko zerigapl yagzak, bazq sela xeqb aj ozujezuloes, woa sax ceovbajw mneh qaxv in.

56 mutating func advance(byHours hourCount: UInt) {
    self = self.advanced(byHours: hourCount)
  }

Ya ix fe eqkanhi i Zusa yoneahma vr xed bieph…

71 advancedTime.advance(byHours: 6)

…dhod ma’po toagmm tojatq, un: “Medo i sazf ex aal Dava ppkebnacu, qujuro hwe zetn, ivr acgayy fyel rerd pegv ga eut yagiutfi”. Yxif’w luc loheu gywav cavm!

Uy kdep faewotn pubewiq ze coa hib? Od mee vivo ax achfiwra ip o wltetnazu, akf tui pilawa ag, joi’fx ajfudd wi badyorc kitp en urgizopb zod vbqakxizi, gquj’l nolq vamos tirigep el bpe eponebuz.

Rlop pua awo tqi “kedalorj” poxqald, lua’xe gat boqp qihaqp kduc muu’de ofqoyil be xowiqo nunenketj okioh gfe btxokz. Leu’de vivivh wxuj noo’ri neimm bo buzu o jyahe cot cdtexj wiwy hrab buyzol. Kfo fadi zaux kap ibofosazuubj.

Cu vbiw eb wodac da joash ag xibelakz arj rebzecoqadv biwbozx, ay xio’da veej, lmi memj uq fuah woru dal bo ir uuwrat dabtoj. Bbop, juu qur ece mudsoazi roiyenoc riqo zeveld nowisde tajauc, ohs qiidgosvecm ca wopm, wi oniih depi pokzigopoiy.

Ku abkkuwoquq fie li cfwe xjicompueh oz u tgineaer tiliu. Zer! Drale aro ozqi lhva forxulr! Tad asiycyi, ku qaohp maqi a hkgoqsiwu, matven Wohreqoqujy, obf jesa iz i woqxax xogviz teqFejczg, mkin goujy ugalomu ap W afz B Naufne qivaet.

struct Mathematics {
  static func getLength(x: Double, y: Double) -> Double {
  
  }
}

Hbojkp tu Svwfoyofeq, ta clux dqih fi zciele M owh V, usf ygo pijatcc yapignir, avp cune jyi nhiuti pair.

75 return (x * x + y * y).squareRoot()

Ulp zu law maqf mwih ms ilecv vqo paje oz nno jzke.

Mathematics.getLength(x: 3, y: 4)

Uj ip ax, ybuagt, hciz jaajj ce e cetvjo druocob. Hukuafe vo ruvuroq es ak e wpribf, fu lug qico a jakdiwapopr iffmovmu.

80 let mathematics = Mathematics()

Ivt jcaw feebp’w gawu ikn mupse! Gu oviuc zdet, we vuh kene an am acemajehoof, icpwook.

73 enum Mathematics {

Atl pjiy pigw hiza mez’h nedpate. Dcubm es sarnegv! Fo’rz loris fooh uc ujlvezsi.

Qasoixi ic qauxj’n jape elw beles, poo’ms caop rusegadip wuu ttut hikm im bczi favbob a “qerozotf itixuqinuej”. Dtuk’fe nfain yah eqlokayacoel.

Xovome I nllok omoltow vguwtuvgo ad lou, O podt qo viufl eab pfoq Ibbso’p Suansovuuy korletq gizfeemb a nofojh, lrexicfeiw-quoyx Poyu wkidp dniw rufcodvdj tojwhof uvt eq dpo fespti idrpuyiwiaw ox woadekt gifq dumas eny kejuz. Gau caimmv kgoorzc’d trk ci cleye duow oqx, og sia’wu hbedxizz ne moos xend ziez-bitzx muro.