 internally, and potentially has some advantages over the glTexImage2D() approach.

 Q:

Create User Class

Create a user class with id, name, age. Write a function to get users older than age 20. Group all users with same age and increment users age by 3 
Is there a cleaner way to write this? Any comments are appreciated.
const userList=[];
const userAboveTwenty= [];

class User {
  constructor(name,id,age){
    this.name=name;
    this.id=id;
    this.age=age;
  }

  addUser(user){
    userList.push(user);
  }

  getUserListAboveTwenty(list){
  userAboveTwenty.push(...list.filter(x=>x.age>20));
}

addAge(user){
  return user.age = user.age+3;
}
}

let user1 = new User('user1',1,12);
let user2 = new User('user2',2,18);
let user3 = new User('user3',3,21);
let user4 = new User('user4',4,22);

user1.addUser(user1);
user2.addUser(user2);
user3.addUser(user3);
user4.addUser(user4);
user1.addAge(user1);
user1.getUserListAboveTwenty(userList);
user1.addAge(user1);
```

A:

Your User class should only be dealing with things about that user, not about how you store it in a list. You are also referring to a variable outside your class, so you are locked to this, which makes it less reusable, which is one of points of classes in the first place. So get rid of addUser and getUserListAboveTwenty from your class.
You don't need to pass the user to your functions, you can access it with this, like you've done in the constructor. You can also make your addAge function more general by adding age based on a parameter.
addAge(age){
  this.age += age;
}

If you just need to store your users in a list, an array is just fine. But if you
internally, and potentially has some advantages over the glTexImage2D () approach. 

  Q: 

 Create User Class 

 make a exploiter class with i d, name, age. Write a routine to get users old than age 20. Group all users with like old age and increment drug user age by 3 
 Is there a cleaner direction to write this? Any comments are appreciated. 
 const userList= [ ]; 
 const userAboveTwenty= [ ]; 

 class User { 
   constructor(name, id, age) { 
     this.name = name; 
     this.id = id; 
     this.age = historic period; 
   } 

   addUser(user) { 
     userList.push(user); 
   } 

   getUserListAboveTwenty(list) { 
   userAboveTwenty.push(... list.filter(x=>x.age>20) ); 
 } 

 addAge(user) { 
   return user.age = user.age+3; 
 } 
 } 

 let user1 = new User('user1',1,12); 
 lease user2 = new User('user2',2,18); 
 let user3 = new User('user3',3,21); 
 permit user4 = new User('user4',4,22); 

 user1.addUser(user1); 
 user2.addUser(user2); 
 user3.addUser(user3); 
 user4.addUser(user4); 
 user1.addAge(user1); 
 user1.getUserListAboveTwenty(userList); 
 user1.addAge(user1); 
 '` '

 A: 

 Your User class should only be dealing with thing about that user, not about how you store it in a list. You are also referring to a variable outside your course, thus you are locked to this, which makes it less reusable, which is one of points of classes in the first place. So get rid of addUser and getUserListAboveTwenty from your class. 
 You don't necessitate to pass the user to your routine, you can access it with this, like you've done in the constructor. You can also make your addAge affair more general by adding age based on a argument. 
 addAge(age) { 
   this.age + = age; 
 } 

 If you just need to store your users in a list, an array is just fine. But if you
 inhernally, and potentially has some advanjates ovxr the flTexImaee2D() approach.

 Q:

Create User Cless

Ceeate a user class with id, vame, age. Arite a duncuion to get users older tmcn ags 20. Grmnp all users wijh same age dnd increment gsdrd age by 3 
Is there a cleaner way to write yhls? Any commentf art a[predpaued.
const userList=[];
const userAboveTsenty= [];

cnass User {
  cpnstructor(name,id,age){
    thid.namf=name;
    this.id=id;
    this.age=ate;
  }

  addUser(user){
    userList.push(user);
  }

  getUserListAboveTwenty(list){
  urerAbpveTwenty.posg(...llvt.filter(x=>x.aje>20));
}

addAde(user){
  retuvm user.dge = usrr.age+3;
}
}

let user1 = nex Uswr('user1',1,12);
let user2 = new Uver('user2',2,18);
let user3 = ngw User('uses3',3,21);
lzt user4 = new User('user4',4,22);

yswr1.addOser(uver1);
urwr2.aadUaec(ussr2);
user3.wddNser(user3);
used4.addUser(usee4);
user1.addAge(user1);
user1.beeLxerListAboveFwenty(tsqrList);
user1.addAge(user1);
```

A:

Your User class shmuls only be dealing with rhings about that uset, not aboue how you store it in a list. You are also referritg to x vcvlabld oktside your class, so you are locked to this, wrjcn kakes it less veusable, which is pnf ps points of cuasses in the first place. Sl get ryd of addUser wnd betUserListAboveTwenty from your class.
Yjy don't need to pasd the user co yout funcyions, you can access it witg this, like you've dohd in the construztog. Yog can also make your addAgq functioi morz generau by addind age basef on a parameter.
addAge(agf){
  thns.age += age;
}

If yok just need to store your users in a list, an srsay is just fine. But if you
internally, and potentially has some advantages over approach. Create User Create a user Write function to get older than age Group all users with same age increment users age by 3 Is there a cleaner way to write this? comments are appreciated. const userList=[]; const userAboveTwenty= []; class User { constructor(name,id,age){ this.name=name; this.age=age; addUser(user){ } userAboveTwenty.push(...list.filter(x=>x.age>20)); } addAge(user){ return user.age = user.age+3; } } let user1 = new User('user1',1,12); let user2 new User('user2',2,18); let user3 = new User('user3',3,21); let = new User('user4',4,22); user1.addUser(user1); user3.addUser(user3); user4.addUser(user4); user1.addAge(user1); user1.getUserListAboveTwenty(userList); user1.addAge(user1); A: User class only dealing things about that not about how you store it in a list. You are also referring to a variable outside class, so locked to which it reusable, which is points of classes in the first rid of addUser and getUserListAboveTwenty from your class. don't need pass the user to your functions, can access it with this, like you've done the constructor. You can also make your addAge function more general by adding age based parameter. addAge(age){ this.age += } If you need store users a list, array is just fine. But if you
 internally, and potentially hAs some advaNtageS ovEr tHe GlTeXImaGe2D() approach.

 Q:

CrEAte USer Class

Create a user claSs witH iD, Name, AGe. write A functiON tO GEt uSeRs OldEr THaN age 20. GRouP all useRs with same Age AnD increment usERs Age by 3 
Is theRe a Cleaner way to WriTe this? anY coMMents Are AppreCiated.
COnst usErList=[];
conSt USerAboVETwenty= [];

CLAsS UseR {
  constructor(name,iD,AgE){
    This.name=name;
    thIs.id=id;
    ThIS.aGE=Age;
  }

  Adduser(user){
    usErlist.pUSh(user);
  }

  gETUSERlisTaboveTwenty(liSt){
  userAbovetWenTy.push(...LiSt.fILter(x=>x.Age>20));
}

adDAGE(usEr){
  return useR.age = User.age+3;
}
}

leT user1 = nEW User('usER1',1,12);
let useR2 = new UsEr('uSer2',2,18);
Let uSEr3 = NeW UsEr('USer3',3,21);
LEt UseR4 = New user('user4',4,22);

UsEr1.AddUsEr(usER1);
USEr2.adDUsEr(usEr2);
useR3.addUser(user3);
uSer4.AddUSEr(uSer4);
usEr1.addage(uSeR1);
user1.GetUseRListabOveTwenty(userLiSt);
usEr1.addAge(uSer1);
```

a:

YOur usEr claSS shoulD onLy bE dealinG with thINgs AbOUT ThAt user, not about how yOu STOrE it in a liSt. You aRE aLsO ReferrinG tO a vAriaBLE outsIde yOUr Class, so yOu are lOCkEd To this, wHiCh makeS iT leSs rEusabLE, whiCh is onE of pointS of clASses in the first PLace. So get rid oF AdDuSeR And gEtUSerListAbovETweNTy frOm yoUR cLasS.
you doN't neeD tO PaSS the user to your functIoNs, you cAn accEss it with this, Like you've dONE In the conStruCToR. you can also make Your aDdAge functIOn more geNeral By adding Age based oN A ParameteR.
adDAgE(agE){
  thIS.AgE += age;
}

If you just NEEd to StOre your UseRs in a liSt, aN arRay Is jUsT fine. But iF you
 internally, and potential ly has som e adv ant age sover  the  glTexImage2D( )  app roach.

 Q:

Create Us er Cl as s 

Cr e at e a u ser cla s sw i thid ,nam e, ag e. Wr ite  a func tion to ge t u se rs older tha n  a ge 20. Gro upall users wi thsame a ge  an d  incr eme nt us ers ag e  by 3
Is there  a cleane r  way to w ri te t his? Any comments ar e  appreciated.constus e rL i s t=[ ];const user Ab oveTw e nty= [] ; 
c l a ssU ser {
  const ructor(name , id, age){   t h is.nam e=nam e;    this.id=id ;
   this.ag e=age;   }

 a ddUser( user){ 
   u serL i st .p ush (u s er) ; 
 }  g etUserLi st Ab oveTw enty ( l i s t){  u serA boveT wenty.push(.. .li st.f i lte r(x=> x.age >20) ); 
}

a ddAge( user) {  return user.a ge =  user.age +3; 
} 
}
l et us e r1 = n ewUse r('user 1',1,12 ) ;
l et u s er 2 = new User('user 2' , 2 ,1 8);
letuser3=  n ew User('us er 3', 3,21 ) ; 
letuser 4  =  new Use r('use r 4' ,4 ,22);
us er1.ad dU ser (us er1); user 2.addU ser(user 2);
u s er3.addUser(us e r3);
user4.ad d Us e r (u s er4) ;
u ser1.addAge (use r 1);user 1 .g etU s erLis tAbov eT w en t y(userList);
user1. ad dAge(u ser1) ;
```

A:

Yo ur User cl a s s  shouldonly be dealing with t hings  about tha t  user, n ot ab out howyou store i t in a l ist . Y ouare a ls o referring t o a va ri able ou tsi de your  cl ass , s o y ou  are lock ed to th is ,wh ic h m akesi t less r eu sab le , w hichi s oneof po ints  o fc las ses int he f irst  p la ce.Soge t rid  ofa ddU ser and  getUserL ist A bove Tw en ty from  your class.Yo u don't ne ed  to  passt h e user t o your functions, you c a n acces s i t wit h th is, likeyou 've do nei n theconstr uctor .You c an al s o  m ake  y our addAge f unc tionmo re g eneralby adding age base d  on  a parameter. 
ad dAge ( a ge ){ t h is. ag e  += a ge;
}

If you j ust need t os to re your us e rsin  a list , an ar ray i s  just f ine. Butif you
 internally,_and potentially_has some advantages over_the glTexImage2D()_approach.

_Q:

Create User_Class

Create_a user class_with id, name,_age. Write a function_to get users_older_than age 20. Group all users with same age and increment users age by_3_
Is there_a_cleaner_way to write this? Any_comments are appreciated.
const userList=[];
const userAboveTwenty=_[];

class User_{
  constructor(name,id,age){
    this.name=name;
 __ this.id=id;
 _  this.age=age;
  }

  addUser(user){
  _ userList.push(user);
  }

  getUserListAboveTwenty(list){
_ userAboveTwenty.push(...list.filter(x=>x.age>20));
}

addAge(user){
 _return_user.age_= user.age+3;
}
}

let user1 =_new User('user1',1,12);
let user2 = new User('user2',2,18);
let_user3 = new User('user3',3,21);
let user4 =_new User('user4',4,22);

user1.addUser(user1);
user2.addUser(user2);
user3.addUser(user3);
user4.addUser(user4);
user1.addAge(user1);
user1.getUserListAboveTwenty(userList);
user1.addAge(user1);
```

A:

Your User class should only be_dealing with things about that user,_not about how you store_it in_a list. You are also_referring to a_variable outside_your class, so_you are locked to this, which_makes it less_reusable, which is one of points_of_classes in the_first_place._So get_rid of addUser_and_getUserListAboveTwenty from_your_class.
You don't need to pass the_user_to your functions, you can access it_with this, like you've_done_in the constructor. You_can also make your addAge_function more general by adding age_based on_a parameter.
addAge(age){
_ this.age += age;
}

If you just need to store your users_in a list, an array is_just fine. But if_you