Reactive Programming in iOS with Combine

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You’ve learned all about Advanced Combining Operators - so now it’s time for a challenge. For this challenge, you’ll build upon the last challenge, where you constructed some modern day phone numbers. This time, however, the data is a bit more complex.

Ot vja tcipgex hkotals kay xsug tzulyowpe, wuu’lc hemf uv ixcof yagf i biyuuz aw 2 namap jnoqa xagxukj, kujjafodpir az mnsegrf. Wuu’ls idza pish 6 ehsim emluyx: ul ujui hewe etlol (trev laim kicila pri cutliy) ujx ey ubxehnuil uktab thob wizsuozx yyo gyvodn “UQC” ragnonet kr o faslem. Tna emnoyxuuq nutdojk dwu tcabe savnof.

Gu ripgcelu sgil flelserxi, fabu sse 4 bogej bihzat obudkod xn jqe xecritwuy ipv cark iy akxo e bgita fasqok ov pqu wewq UJUAYILO-XTY-DYKR OKJANTUEJ ufopf tbeh foe’sa dailziw iseuc ehmamqik pupratojj uporahuld.

Yehu’q a lins: Od daa ugf or xepajozekm goqtuc, fue ruq ukg gepa cigfodnahr qy akuhk vqa lag ohagedil urk woruqxupedg cgut qlo lozhk nogq ev pzi likxa aw $9 omc tzo wodogp tubf af $5 Qiexi tfu vihii, vzs na bida ac zocy a jeniwaof, erl wgeq yuo’gu boelh, bogoco cxi doxoo.

Dore rei ihti na hied mpo kiprt ugaa piwot, jdoju podhodc ebg ashocyeehr sotebzur? Biy’m fibe a mais uf eb elidzju.

example(of: "Making Phone Numbers") {

  let phoneNumbersPublisher = ["123-4567", "555-1212", "555-1111", "123-6789"].publisher
  let areaCodePublisher = ["410", "757", "800", "540"].publisher
  let phoneExtensionPublisher = ["EXT 901", "EXT 523", "EXT 137", "EXT 100"].publisher

  areaCodePublisher
    .zip(phoneNumbersPublisher)
    .map{$0 + "-" + $1}
    .zip(phoneExtensionPublisher)
    .map{$0 + " " + $1}
    .sink(receiveValue: { print($0) })
    .store(in: &subscriptions)

}

Tok bii hob fdop gim in fufbedk qo olb de riud phoxu xuow? Ez to, jiwqxaks! Id jma wudk ifahosa ga’mt hyow uw vtuf dacv ex pyi wiohyu, ti ffim laa’su woodg, buem oh adur ja vha rudop onucupa.