如何在一个长行中每3个字符后创建一个换行符？

Question

我想将下面的行分成1000个，每个3个字母：

 saahaalaasabaaboabsabyaceactaddadoadsadzaffaftagaageagoagsahaahiahsaidailaimainairaisaitalaalbaleallalpalsaltamaamiampamuanaandaneaniantanyapeapoappaptarbarcarearfarkarmarsartashaskaspassateattaukavaaveavoawaaweawlawnaxeayeaysazobaabadbagbahbalbambanbapbarbasbatbaybedbeebegbelbenbesbetbeybibbidbigbinbiobisbitbizboabobbodbogboobopbosbotbowboxboybrabrobrrbubbudbugbumbunburbusbutbuybyebyscabcadcamcancapcarcatcawcayceecelcepchicigciscobcodcogcolconcoocopcorcoscotcowcoxcoycozcrucrycubcudcuecumcupcurcutcwmdabdaddagdahdakdaldamdandapdawdaydebdeedefdeldendevdewdexdeydibdiddiedifdigdimdindipdisditdocdoedogdoldomdondordosdotdowdrydubdudduedugduhduidunduodupdyeeareateauebbecuedhedseekeeleffefsefteggegoekeeldelfelkellelmelsemeemsemuendengenseoneraereergernerrersessetaetheveeweeyefabfadfagfanfarfasfatfaxfayfedfeefehfemfenferfesfetfeufewfeyfezfibfidfiefigfilfinfirfitfixfizfluflyfobfoefogfohfonfopforfoufoxfoyfrofryfubfudfugfunfurgabgadgaegaggalgamgangapgargasgatgaygedgeegelgemgengetgeyghigibgidgiegiggingipgitgnugoagobgodgoogorgosgotgoxgoygulgumgungutguvguygymgyphadhaehaghahhajhamhaohaphashathawhayhehhemhenhepherheshethewhexheyhichidhiehimhinhiphishithmmhobhodhoehoghonhophoshothowhoyhubhuehughuhhumhunhuphuthypiceichickicyidsiffifsiggilkillimpinkinninsionireirkismitsivyjabjagjamjarjawjayjeejetjeujewjibjigjinjobjoejogjotjowjoyjugjunjusjutkabkaekafkaskatkaykeakefkegkenkepkexkeykhikidkifkinkipkirkiskitkoakobkoikopkorkoskuekyelablacladlaglamlaplarlaslatlavlawlaxlaylealedleelegleileklesletleulevlexleylezliblidlielinliplislitlobloglooloplotlowloxluglumluvluxlyemacmadmaemagmanmapmarmasmatmawmaxmaymedmegmelmemmenmetmewmhomibmicmidmigmilmimmirmismixmoamobmocmodmogmolmommonmoomopmormosmotmowmudmugmummunmusmutmycnabnaenagnahnamnannapnawnaynebneenegnetnewnibnilnimnipnitnixnobnodnognohnomnoonornosnotnownthnubnunnusnutoafoakoaroatobaobeobiocaodaoddodeodsoesoffoftohmohoohsoilokaokeoldoleomsoneonoonsoohootopeopsoptoraorborcoreorsortoseoudouroutovaoweowlownoxooxypacpadpahpalpampanpapparpaspatpawpaxpaypeapecpedpeepegpehpenpepperpespetpewphiphtpiapicpiepigpinpippispitpiupixplypodpohpoipolpompoopoppotpowpoxproprypsipstpubpudpugpulpunpuppurpusputpyapyepyxqatqisquaradragrahrairajramranraprasratrawraxrayrebrecredreerefregreiremrepresretrevrexrhoriaribridrifrigrimrinriprobrocrodroeromrotrowrubruerugrumrunrutryaryesabsacsadsaesagsalsapsatsausawsaxsayseasecseesegseiselsensersetsewsexshasheshhshysibsicsimsinsipsirsissitsixskaskiskyslysobsodsolsomsonsopsossotsousowsoxsoyspaspysristysubsuesuksumsunsupsuqsyntabtadtaetagtajtamtantaotaptartastattautavtawtaxteatedteetegteltentettewthethothytictietiltintiptistittodtoetogtomtontootoptortottowtoytrytsktubtugtuituntuptuttuxtwatwotyeudoughukeuluummumpunsupoupsurburdurnurpuseutauteutsvacvanvarvasvatvauvavvawveevegvetvexviavidvievigvimvisvoevowvoxvugvumwabwadwaewagwanwapwarwaswatwawwaxwaywebwedweewenwetwhawhowhywigwinwiswitwizwoewogwokwonwoowopwoswotwowwrywudwyewynxisyagyahyakyamyapyaryawyayyeayehyenyepyesyetyewyidyinyipyobyodyokyomyonyouyowyukyumyupzagzapzaszaxzedzeezekzepzigzinzipzitzoazoozuzzzz

请为我提供处理方法的建议。

Answer 1

在正则表达式模式下尝试以下查找和替换：

Find:    (...)(?=.)
Replace: $1\r\n

Demo

模式(...)(?=.)一次匹配并捕获任何三个字母。然后，我们用这三个字母（$1）后面跟一个换行符（我使用\r\n，Windows行结束；如果使用Linux，则使用\n）。请注意，仅当找到的三个字母不是字符串中的最后三个字母时，该模式也才匹配。正向(?=.)的前瞻性避免了在结尾添加不必要的中断。

Answer 2

此正则表达式

.{3}\K

替换为：

\n

可以简单地做到这一点。

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如果要浏览/简化/修改该表达式，请在this demo的右上角进行解释。