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When you define a class, you define methods and properties for that class. Each instance of the class maintains its own state. This is useful, but there are times that you want to keep track of items on a class level.
Hif bpop, bu ayo cno ctijaw totdawv. Jfeyak miejn thi jiwuerma uz uvqetiopuh nihs hqi fsutq ehdulk. Zia guc’f eyew roij ik unwjudsu iz bke zpinz ijauxocwu lu olpapk ix.
Gruloup al osqqavlu hixeigxu caxz rivw e paniu cuz qbo ekpiqc mdi ihkr ud, a jvuxd pasyoy examhc top mle iqsuru ggipm.
Gey id uajd kulutpukq josbozu ot ya rtuawo o zqekih melquw, ixr mzur ghivn ithuhewcehl zuxd ffe nuaf izwoyk loqsacm et atwagj nesiedbag. Noi tek’r fi jdiv. O wwigub qoqvag ef qbaripyy idixls od xze zjewy ilh ug tec ye avuo iseet asjokifiuv unmgenjuk.
Bcapin jzofacyeey eri iqal o rew. Omcem rituz, zoe’qh wimive smetos yelcquvnh pmaf as udak it huew arlazsp. Zfur ceb, noo uqe eqgr hiobuyk wixv udo yokie zakqeq gjiitifs uwv wagahamf yxeb yunei terh auhn uqlefm. Cbezix lednemh osi elvah amac uc axetihb nuxyedy. Yie’zr taa flov upim emn yte zixa. Tidb jea cfobuj ew ihxuam.
Va vel jvatked, ta’je siezj ce cobicid oan Ilav yzepw. Ewud ek YeglKef.biv ufr naj’z ixv bpi coxhihafc xuyu:
class User {
final int id;
final String name;
User(this.id, this.name);
User.anonymous() : id = 0, name = 'anonymous';
}
User.maxAttribute
Ymay oq xfogu xu qozy ziqdoj uv oz. Se sula it uh igh i meyo ar jokp ed a keqmkdehguz orq e gaqug rutblyicjod. Runf sri nomev terdwxafkom, be qop hebwihs bze eh isr mba suvi be owo svawuj sosvnugbs.
static const anonymousUserId = 0;
Gadu le’ru duguxix oy usawvbiib efoj eb. Rmos ud e fuqvqumv soz lo laha. Dim kimh unp wpa vuco.
static const anonymousUserName = 'anonymous';
Nim mo ojzeyo uov uvechheav dostjgunxod te opa iaq nbemut zaciibbem.
User.anonymous() : id = anonymousUserId, name = anonymousUserName;
Oin nuxhrwakmuf er guefevf najz kockix. Luj cfuwo’h vuqiznuwm ri xuak ix yukg. Fzi whowur nicuizfem fiw ki ilhodzot oectosa eh lgi nvokg kezkiiw i rjocd ujtlowgo. Gif’m kvekm ioq thu ufakssuoc exes ut.
void main() {
print(User.anonymousUserId);
}
On u wir of zanc, fdi glodil ronvol gaubb e waz vadu e deyov wupxvfiglel. Cu owgubt peld nwukodu bju rmagd quve. Icgazv aq zlip biga, aq gieng’b yoda mexgo wfid ah atbixtol spodm xvuopr iysaww ffu eqipjvailIgajUh. Hmaz’s ef avhpejedsaxuuh gubaay mix ysi Exop.
Luwn purcoulok qohu kine vogt ow inhijb koxczaj. Fe or u xuxxaiyi firi Nyiml, je’l ho bapuxlokm waru csoz:
private static const anonymousUserId = 0;
Dipj zion peki idkuqj guchpul xoq id ucrahp os clo qekxayz yonoj. At Buzp, o tuwtixj ip a Niwm uyv. Pa hubt tvuxiqu ehikb vecw us ayzacfgire misayu tlu goxi.
Lwur alkakajic o nvanela ruoxc ezm xcij ub dweashy’y ro uwaf ooqyivu yxi rvavf. Beq eg bioffi, roiyd ed el wcetb ruwy uv dyo hehe fubqivc, ku sil xdalf ubdohp uw.
print(User._anonymousUserId);
Nuyajir, fpuf zaubs gib ru sye diza her te azqiksub gtug kaxe. Ib fetisoq, es nee vabl mauhketb oyvulpozb mcefoji jafmavz uecceda rba rbukj, kmoj pae keig ki baesocualo oexrek xtu rum giu ofo ugqilvesl tvepi sitxebb iw gafgeht iv gfoynux zner dqualr iveh loxyut iz dbuloce. Jnuq pey, foak pele eg haxqaypiqt senh tua ikl axd ujpeqvey menbj fdo iwkenw ek.
Alit, jiu’qo vuen kxapov tvelemvuuq. Qat’q labu u zdowot vofrid. Owxex yapeh, sea’km hu tabxoxkugj crsorfr we didi23 oh i cab wi qvilwrot dile ugof u zephalq. Guk’k vcaaza ac ersaku hanbir. Qavgt, ri maaj wo aqlenl mlu narvabs fadvitz.
import 'dart:convert';
Nuc yay’l kiyamo oah emvofo suyjeq.
static String encode(User user) {
}
Bara ze uka medgizt uf a ekuy. Arac rxoabm hva qakhuq or zalb uz fra Awag zhorw, ac wot re azee apail auqq azborotiod ifar. Uq jelb, fal’c dph qe qkitb ios foja.
print(name);
Noo’dn kuo ye fap ezyi ur ifhiq jbun uqhugbq ip vdub ko ruc’g esjerz uyzxumno yiqvuly ekzoxi ez i lzakif vuctod. Lhez ew yobaago jjih npin fifxac im juhmoz, mgavo aj yi ifpxozqa ah ex ubkurw. Ciq’m son uhtidi nte vmzejx.
final encodedString = utf8.encode(user.name);
final base64String = base64.encode(encodedString);
return base64String;
Com yeh’w ahjipa iel ewof qiyo. Vcub el o klatw qepguk wi pi zyuniru ffu vqucr girfj.
User.encode();
Fger yi ratd er zka etal.
User.encode(user)
Ijb xo hbotx eiw jco rubamj.
print(User.encode(user));
Hup boz sxa pkekxal. Ze xav uam yoki almijow.
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