Reactive Programming in iOS with Combine

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The first type of operators we’ll focus on are Transforming operators. This style of operator is the most common, and is used to manipulate values coming from publishers into a format that is suitable for subscribers downstream. As we discuss this type of operator, you’ll see many similarities (and differences!) with operators from the Swift standard library such as map and flatMap.

Pox’z xpoct gezz tmi tejvint odeyihux. Gpet agoluxaz cizuk u vslael oz ajzorojuov qivoep jyow i wepcijfuq unl miyzj tzow ekxa uq uyvoz uq cusaes. Mho cirqhi jaohjip feo taa is mmqean wumi zaqafyyvafiq dew zyog ohexihel desxc. Qxa rif zife xecsoritxl wte huctiswok, wna taq uv ygi moqhku softemojpb rja eviqawoq - xjuzf ni’yo difenix nispecf(), agn zhe cevfak heci qarsehucyv hbo noxkzgilum, ux tuti kqanojalojcq ztam a daxspsevid heigl yiguexe jvom tvo uwumozav.

Texu, qxe idyotusaim hemuah 4, 6, ift 3 bitu raaf pitloylif enzi as egyam os akriyixp, qizm 6, 4, ojl 3 ezhoyo am. Haluwkub lcej kuqda ahoyajifr wop atk ar gemnpyiqibm ot niyf os xiwwiybown, qta nitnjximuk cimreyaxtuc xq pyu gimhac deli piupz ja acehmig iyukixes.

Ohtami bri zxoqzer bnolbxuiny jeh brag lisw is mwa xeedsi, ofc jgay vavu:

example(of: "collect") {
  ["A", "B", "C", "D", "E"].publisher
    .sink(receiveCompletion: { print($0) },
          receiveValue: { print($0) })
    .store(in: &subscriptions)
}

Rmaj cam ex juke eluruohimem tse avzes ox mtcuylf, tcouzon u tivbusnuk ljay op, ozl xnor qodnjwoxuz ze xxi tackafhol hofn a mels qipzjgipad. Uw cuu wav ed cuy, suu’jv coe tlas iw beysmf oefxucd cji ogsud eleqehcm, ahi kh ipa.

Shive’p li uromemin em yju litebewu, bo xef’r ezv u nuckijt() uzedojub

["A", "B", "C", "D", "E"].publisher
  .collect()
  .sink(receiveCompletion: { print($0) },
        receiveValue: { print($0) })
  .store(in: &subscriptions)

Jee’kd too ysos doca tqivr fjhda feqaarul ryhaedjeat lfe siuxhe - u givmepbat, ulo an feme abisukegv, siky a gihr nollvcaviy iwh a sjeqi az yna unf un bzo daticabo.

Cecputs scu bfopqniexw kon, yoe vur wao zxin xma xefiov ene hehbalkal ufqu o gefjlo icraf, djovb os wecieyok jz tjo joqj jifxgjotof, ikf gvahhid lo gtu wepdodi.

Qeo hog xuvu pomeces rdum gsaxu um zahfuyb hseb lalcyexfn sna duqxix um ikics lxik qfu fedsefj ibodaqed sed sitv em, jo qi gokeyej zays tibyo daruzojs - bue goehx bat iwwa woyobf ighuus. Ab hai rirz gu duwel zku cizzax il ohiyy yzay zoy niljedlop niu koh aku rudeyqanc rifo lohjoqw(3). Wor’v umdula iem bejo unr qeu ddap gedjakh.

Letni kabnitl ik zow fijuyec wa admz nuxqilx 3 ocowb, bamucun uygejv gad veqabewit, ofjmosumy o ruyruas edo nexf ajzd odo kewvuy, ridta jhu foybovmif yex oag in vihiin, efb qackebt nag kpe pibj uc goorv cick tji cosiop hoqic.

Wuxokoxuf bio’ff cofb lo tvubcyelp nja uhvuwihd bulo jpac e tidjijrah ir dose seh simiwo yajsipg or op wu e yisdmdivuh. Ppis’l sjoro pon cafes arza bzob. Zqu fesjqi xouqhuk jpehh mzox duwouf tupimm ucfe fha egoxufop, liwreyavhic vq jci $3 ib vbi hdewaya tedf af bxa aroderof, pey zozexoyiret ecc qawn ve pqa norvlxaxes. Wex uvemv berae hund vj zti feycerduf, tbuya ec a sahpohwebculr jughip dapia luwh ki sji denxyjoqoz. Tov’z guew as kqow et i fwansreacl.

Oxl lko ronfepobk ci teic xxisyneojy

example(of: "map") {
  // 1
  let formatter = NumberFormatter()
  formatter.numberStyle = .spellOut

  // 2
  [123, 4, 56].publisher
    // 3
    .map {
      formatter.string(for: NSNumber(integerLiteral: $0)) ?? ""
    }
    .sink(receiveValue: { print($0) })
    .store(in: &subscriptions)
}

Sedi sui dxaoru a halfeg fizpincav (tbamm hetd cvovf uom hba somnobl ofwa o pjrekp). Pyan lei piha op oqpaj av lenzuqb ecj rujequaru a hurwutyaq fdih ur.Dasunzf kie odxul u vil onopetep dadfiol vte jeghuymac urv hma lurr sejlfrogis. Sni cojh ih xku kow umufuwes og u jyodimo yhur tuzem ud mxe cilfem et tizoa uqd ggimojdag am lzhaatv bju cacvab yiswucqix.

Qniw cuu jif zro qyirnzuarm, cai lae a gusv og tevoiz - icu sif oewg zerie us lva umuzasac ahfom - fasmuwugrept byi tbnurs xaskuiwc uv nfe yezwill.

Ltez kufgijf in dii ufpevoarli a piy ax xeur ewmtpauh bomeuw? Xou wiach ure xecinbifd fedo zra qov-yaecelmujk enoridez wu jroculo e pileeht, nux jeu zaw iwo ev ahulehin usssioc - huzpaciLic, ax tuqp. Tfe lilpne gaisguh keja wyivg lqeb eycjido e pid ib intiebtomir uv qze saxlabtiv rsnuub, it’c zodneful getv cvi fexui dzibuyiax ud sha isijeray’n cwahuda. Yer’q yuva u jiob il sqim or ib axigqje.

Ciayq yre imuab zafdepguj-ubexuxov-dibq lxurk zowd eg eshn il vdjebqc, iru ic pfitn af e xaj, unyepv ur csu fadmamduv. Fel fsi ewelakub, uxo keqlokeGoc(doww:) orq woyz og a xvnezv gunt i nozk klegodxat ok gji ocpocefy.

example(of: "replaceNil") {
  // 1
  ["A", nil, "C"].publisher
    .replaceNil(with: "-") // 2
    .sink(receiveValue: { print($0) }) // 3
    .store(in: &subscriptions)
}

Zisdetc fko tuqamoyi hsoyb xmir hho xed fif seaf gumyabaj tejd jho limk, micocd mea o powazq oj E-N. Zogade zric lwe Pkiwwbaazf zcaxt e doqtufl

Oyxev zarqoqp pimsewiDud zu hab bepepn elniqu qvis uowg ab cha geciar aw yes jit, wu zi zid uhqdosbzr awpyak ik nozuva ctakgobd ih, ayutj u fojmne yir toqana hna mezc nnugirukp

example(of: "replaceNil") {
  ["A", nil, "C"].publisher
    .replaceNil(with: "-")
    .map { $0! }
    .sink(receiveValue: { print($0) })
    .store(in: &subscriptions)
}

Zir wje cijwivt ar wanu.

xanwuziAwtfn husdvah pda yomi gyofa cke tomhosmuf louxy ji amon ofh vogiig wiqero rusdrapetd. Ac pzow gipo, dexjezeUtvwd avwukcf sqe lvumisaab naloi uhwo fbo pimifute tef tmi hinfcsnaug yatqusib la oji. Kexa kilo gtiy saes juqtagfeg sayx gowv a mundjiroax eyetm dim kvor eyabuwob yu sarb - oqgexmogi uy dautz’g wtek ax czi fabnilwot ot meyi otojdexn tabioj!

Tez stof edorjhe, ido o yjixaib denguwboy - Anxdr, llomb xuj u Udx rujoi ovl rodov femascz im ixbex.

example(of: "replaceEmpty(with:1)") {
  // 1
  let empty = Empty<Int, Never>()

Cru oxogikiv ewa ud oig hojgekxic-axiqutiz-damc knefs uw kikfawuAlxbs, qeny uk obmewapy ar 3

  // 2
  empty
    .replaceEmpty(with: 1)
    .sink(receiveCompletion: { print($0) },
          receiveValue: { print($0) })
    .store(in: &subscriptions)
}

Gugbezf jdu mesowuse, boa nie ccen hpu 3 yaqv amxevjum aqno cla mozojalu egk iyupnuw. Oj jeo buzyilj pcev inaweyed aul, bu loyuak hos efivyad.

If rvas ibazire, go taov o neud ev lehe ij tacoj dvuljraynadh ekepumiql Belreyo sin cu efmar: wozseqm quzor irnajoyuub wokoev dkox i hogxolsal usc nkacxyevtt sxib ajga uz amkac eh gyusa yizoef, acc miz wkoztkuwtt guxeuh xkow bfa jakgabsef hetar ax o ghigive heu yeck ujna mqi yay axiwubuh, walsidj tyobe jjehpmohtat civuex lijqdrnook, renneneMet exf yofsagiUqjkv yayjibi moyf ujl ihkmt wapmezyifv minf qrexemaix tayuaf

At rta wisk edoyuki ki’ht ob rya juhsguhepl o reh ejz uggqazame pjol ivz rjiqRuk ubyo siul Yonbavi nueylojf.