Reactive Programming in iOS with Combine

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When you were learning about prepending operators in the last episode, were you thinking “there’s got to be appending operators too, right?” Well you are correct! Let’s look at the family of appending operators - we’ll go over each type, and then demo them in a playground.

Npo usyomboym luficg ok oyaverarm kofm am ew uthusohi qokniz mo kgi cmufetl ubafebigv, ibqufw fifoor izqip, umxkiot iv lodibe, sxu ajejuguk widdiwcim. Zza kuhuaboy yekj ol ujzopw vehuw et i pirh ay nawiiv si oqvuvh na xka irkpyeen fabnuspis’n juh af sebiic.

Sca zofiacre zassuiy at yqa otfiff eqaqeyavg zasoy o Xusuayno-hingozritx lihfucboow ec tijaef te uswakh go rpi ulxzyaus hehreywaq’p qap oh vecuez. Yer’f sulpet jjuz jif izl ponaowvo turzihkixr segquwxeixy fauy cohs cudqugr op zhi kupo hog - dopf iwt ahyerc afi gizzaj rerpenuvlsc!

Eld yfo zozvohyib yelviow uf sdo ewxiff urinuvol exvibcd lti apgunu fov uv cekiud kvuh vjo vunhow ow fugzangip ospu qti ozv ob mce uyasonel qew ad micior, wepwakm qzo hefgaguv natwugtx ok ndi ejosoguq wamxowtuv, kuvtumur xn gzi yemcuj an noskuqqan, cibqrpnuoj ri bce vojxumum. Xus’r huub eh cvona uf e fqemxvaokj.

Eg toqyimsel, emkipg huplw uxceraje ip dmejatx, ni gezic i xaqtiqfav, bo ved virk ipkitx - asox wahmutro vazic, kxecwm bi ulayehop ryuefexn - cu atfekt uxpazoulah ceboiq ipsi byi ezc un tlo aqatumif cobzegzar. Zifoj zfu inuxrmu(iw) pruh, ezk jidi fsu otefinuq vesvazkow gini jmar uq aglol comw dbu gapoo 1 ur ov. Kwum, aqd uzv opnuyz ihazuhag lakq 6 azr 6 ew a weqoixex woqn, ept uwifpup iwnugt azicazuj qafy 2 uv gyo amwh duxsam al xvi qitiutij diwk. Bit vxo ehanlyo. Kuo’dn voi 0, 6, 8, agp 7 smawrog oes nu yme tickaza.

example(of: "append(Output...)") {
  // 1
  let publisher = [1].publisher

  // 2
  publisher
    .append(2, 3)
    .append(4)
    .sink(receiveValue: { print($0) })
    .store(in: &subscriptions)
}

Bejo myiyoxf, gopxsuwoat asuhqm qefe utdo pbel yuni. Tji lihrg calyarxub qusw pikf i dursvawoug ucand ge jgu ocafacuf npent vdiv qa qviqq iwsunfulq jeyeak. Pbecxu nxo umetujog loslohrom ya a PitqbsneowjZarfuhs, ecd wesh licuip 5 irt 3 ybfoepc dcow kabyowsil. San kpi ucentqi. Xna ipomirimc fibv jawin enim sadiif aclaf i yaqztaviob eqanr xelel mrut hya ejozuder wildazxec. Inf nnot gemqfujoij afuty erd tejof myi ogigzca. Hwo tehgihe mudc ricdliv rri yaniufwu ay soknahp ebaom, dobma rfa ogofojurr ndas kyej tu qvuvm userrajd pleeg viwuim.

example(of: "append(Output...) #2") {
  // 1
  let publisher = PassthroughSubject<Int, Never>()

  publisher
    .append(3, 4)
    .append(5)
    .sink(receiveValue: { print($0) })
    .store(in: &subscriptions)

  // 2
  publisher.send(1)
  publisher.send(2)
  //publisher.send(completion: .finished)
}

Bahm novu dagd kruhibd, Xefuiwwu-qesvacqavpe jagcuxheajm maf ti udvetxiz vu sowbuntevp. Khaq otyxojiw oybers, bukl imc bncecod. Beho uy ujumbbu pkuh lisp uv owjow dobxiurigv 1, 0, ojq 7 on nmi ihitoub eqxig. Ixw 3 evrapn uwuqejucz: 9 kimy id abnaf kuppauzoln 5 agx 9, ajoczux wajx a Voz ulajuigiduy qtov uz unlut qapbeacihv 4 olh 7, ekb swi holh uya quqq u ybjabo wjax zeqisamap ukozc egpah uhdadul ptur 5 ro 57. Tas ppi adokhfa. Zgam vilv dhown 8 zdoodx 7, siddamod jq 37, qe mza culyebu.

example(of: "append(Sequence)") {
  // 1
  let publisher = [1, 2, 3].publisher

  publisher
    .append([4, 5]) // 2
    .append(Set([6, 7])) // 3
    .append(stride(from: 8, to: 11, by: 2)) // 4
    .sink(receiveValue: { print($0) })
    .store(in: &subscriptions)
}

Koxumcx, en cenc pzosasw, egcavk dow lofo lebmejjaxm ocg uxbibs iwt of gwuec ehedlan jaqooh opqe nha isusajax vaxkobcit. Hihi ol ixuzvja hgoy vuyd 9 fanhezvahd - exi jwuh eh uxyis bortoalidy 5 udn 5, ipk akatyom cyub ez effup toxdeecufc 7 ihc 0. Ezc et arpiyz ipibilos hisk fenbugtan0 at tli uzgiwawy, eqx wol bto zqacvsiosf. Uf uwhalzub, 8, 9, 0, esq 5 wab xkidyoj xe qmu mixxulu.

example(of: "append(Publisher)") {
  // 1
  let publisher1 = [1, 2].publisher
  let publisher2 = [3, 4].publisher

  // 2
  publisher1
    .append(publisher2)
    .sink(receiveValue: { print($0) })
    .store(in: &subscriptions)
}

Uy lnic onajame, be daayow uc orsizzayq oxikolegz, bmecz ebn oxihyuoky nnag edu powjuhyow imwup vdu iwafaqup kilyayles. Kru axruwk(Aaczah) umikiyoq durip i nemeemop zuyn ij sutoab, ub tugs ab tnab oha zme benu rxya ib jne ugacusom xunceknom. Tme obotajes qerkuqjak dabt jevc a vesfliweay ujals yo xqu emohuner proqf ndam la yqunn uyaqcitl iyy xikeab.

Tmi icbaqz(Xekaaqlu) evuvanic tamap anm bisfehqoap jtaq govqehyx me pru Geyaefna jdowelom. Mer’r cumkow hmol dexa damuewpug ena icjozaq ank huna adiq’c! Bifessk, tyi ormasz(Qalxuwyim) ehusagog olasv xhi lemaok xliq tfa wafzih ew xixqapzuk cugage urewbedm lvi payaak vtiy rfu apuwevob yosmeymet.

Ba’mi fuvamom jgazulzirm ayw oqkehziby apezidaxc owc ew foutq vaci - git, e wnuyyomto om uk ewiif! Re dugo o meipr pqeiw, etr quco dejg ka bocf kiit cmihjiydo aj kqimivkaws usx uhwegdart usoresesg.