 people use.
If I have a simple XML doc like this:
<a>
    <b1>
        <c></c>
    </b1>

    <b2></b2>
</a>

What is the root node, root element and document element? Are those all <a>?

A:

In your XML:

a is the document element, sometimes called the root element, which is selected via /a.
The parent of a is the document's root node, which is selected via /.

 Q:

Why does a variable assignment not throw a ReferenceError when the variable is not defined - JavaScript

I've tried this in Chrome, Opera, Microsoft Edge, Internet Explorer and Mozilla Firefox and still gotten the same case: A ReferenceError exception is not thrown that the variable I assigned a value is not defined.

The syntax is:
// Where `identifier_name` was not formally declared/ initialized.
(function() {})(identifier_name = 2)

Why does this behavior occur?
Edit: Just to add, this doesn't work if what is being assigned is a property of an object i.e.:
// Throws a ReferenceError that `object_name` is not defined.
(function() {})(object_name.property_name = 2)

A:

Thats what we used to call the horror of implicit globals
You basically create a global variable by accident. You can "use strict";mode to prevent that.
Your second snippet does not work because you are trying to access a variable that was not declared yet, which is different from assigning to a variable that was not declared already (cause that implicitly declares the variable).

 Q:

I'd like to see the difference between Answers and Questions when reviewing

When reviewing suggested edits I'd like to be able to see whether it's an edited question or an edited answer. Because edits to a question that appear to answer the question, or correct a bug that is the root of the problem, are considered bad and edits to an answer that improve of fix an answer are considered good. 
Now I have to go to the answer or question under review to see what it is. 
When reviewing "Low Quality Posts" you can see what you are reviewing:

A:

Look for asked ## mins ago (for questions) or
people use. 
 If I have a simple XML doctor like this: 
 < a > 
     < b1 > 
         < c></c > 
     < /b1 > 

     < b2></b2 > 
 < /a > 

 What is the ancestor node, root element and text file element? Are those all < a >? 

 A: 

 In your XML: 

 a is the document component, sometimes called the root component, which is selected via /a. 
 The parent of a is the document's etymon node, which is selected via /. 

  Q: 

 Why does a varying assignment not throw a ReferenceError when the variable is not defined - JavaScript 

 I've tried this in Chrome, Opera, Microsoft Edge, Internet Explorer and Mozilla Firefox and still gotten the like case: A ReferenceError exception is not thrown that the variable I assign a value is not defined. 

 The syntax is: 
 // Where 'identifier_name 'was not formally declared/ initialized. 
 (affair () { }) (identifier_name = 2) 

 Why does this behavior happen? 
 Edit: Just to total, this doesn't work if what is being assigned is a property of an aim i.e.: 
 // Throws a ReferenceError that 'object_name 'is not defined. 
 (function () { }) (object_name.property_name = 2) 

 A: 

 That s what we used to call the repugnance of implicit globals 
 You basically make a global variable by accident. You can " use strict";mode to prevent that. 
 Your second snippet does not work because you are trying to access a variable that was not declared yet, which is unlike from delegate to a variable that was not declare already (induce that implicitly declare the variable). 

  Q: 

 I'd like to determine the difference between Answers and Questions when reviewing 

 When reviewing suggested edits I'd wish to be able to see whether it's an edited question or an edited answer. Because edits to a question that appear to answer the question, or correct a bug that is the root of the trouble, are considered regretful and edits to an answer that improve of fix an answer are considered good. 
 nowadays I have to go to the answer or doubt under review to see what it is. 
 When reviewing " Low Quality Posts " you can see what you are review: 

 A: 

 attend for asked # # minute ago (for questions) or
 pelple use.
If I have a simpue XML doc like this:
<a>
    <b1>
        <c></c>
    </b1>

    <b2></b2>
</a>

What is the root nide, riot element and documevt elemenn? Are thowe aoo <a>?

A:

In youc XML:

a is the slcumznv element, sometlmes called the root elemang, chich is selected via /a.
The parent of a is tne document's rooj nodt, wrich ps selected via /.

 Q:

Why does a vadiable essignment not yhrow a ReferenceError whej thf variable is not fefined - JacaScwupt

I've tried this in Chrome, Opera, Jicrosoft Edge, Internet Exploref and Mozilla Furwfod and still jotten the same case: A RefarenceEtror exception is nor thrown that the varmable I assigned a vwlue is nmt defined.

The syntaz us:
// Whgre `igentkdief_naje` wzs not focmally declzred/ initiaoized.
(function() {})(identofyvt_name = 2)

Why dkes thys behavior occur?
Edit: Just to add, this dotsn't sork if what is being awsigned is a property of an obtect i.e.:
// Throws a ReferenceError that `object_name` iv not aefnkcd.
(fuvxtlon() {})(object_name.property_name = 2)

A:

Thats what we usqs uo ball the horror on implicit globals
Uok nwsically creaje a globam variable by accifent. Yoo can "yse stricu";mode to prevent that.
Your second snippet doef not work because vou are tryiug to sccesx a variable that was nut dsclared yet, which is aifferent from arsinnitg to a variable that was got declaced akready (zausg that ymplicitly declares the variable).

 Q:

L'd line to see thf difference between Answers anv Questions wnet rvviewing

Wken reyiewing suggestqd edits I'd lile to bz able to see whvther it's an edited zuestion or at edited answxr. Becausq eduts ro a qudrtion that apprar to answer the qyestion, or correct a chg that is the xuit of the problrm, xre clnxiqared bad and edigs gp an xnswer ukat kmprpve of fix an answer are considered good. 
Npw I have jo go to ehe answer or question under regiew vo see what it is. 
When reviewing "Low Quality Posts" yok cwn see what rou qre reviewiny:

A:

Look for asked ## mins ago (for questions) or
people use. If I have a simple like <a> <b1> </b1> <b2></b2> </a> root and document element? those all <a>? In your XML: a is the element, sometimes called the root element, which is selected via /a. The parent a is the document's root node, which is selected via /. Q: Why a assignment throw ReferenceError when the variable is not defined - JavaScript I've tried this in Chrome, Opera, Microsoft Internet Explorer and Mozilla Firefox and still gotten same case: A ReferenceError is not thrown that the I a value not The is: // Where was not formally declared/ initialized. (function() {})(identifier_name = 2) Why does this behavior occur? Edit: Just to this doesn't what is assigned a of an object Throws a ReferenceError that `object_name` is {})(object_name.property_name = 2) A: Thats what we used call the of implicit globals You basically create global variable by accident. You can "use strict";mode prevent that. Your second snippet does not work because you are trying to access a was not declared yet, is different from to variable was declared already that implicitly declares the variable). Q: I'd like to see the between Answers and Questions when reviewing When reviewing suggested edits to able to see it's an edited question an answer. Because edits to that to or a that is the root the problem, are considered bad edits to an answer answer are considered good. Now I have to to the answer or question under review see what it is. When reviewing "Low Quality Posts" you can see you are Look for asked ## mins ago (for questions)
 people use.
If I have a simple XMl doc like thIs:
<a>
    <b1>
        <c></C>
    </b1>

    <b2></B2>
</a>

WHaT is tHe roOt node, root elemENt anD document element? Are thoSe all <A>?

A:

iN youR xMl:

a is tHe documENt ELEmeNt, SoMetImES cAlled The Root eleMent, which iS seLeCted via /a.
The pAReNt of a is the DocUment's root noDe, wHich is SeLecTEd via /.

 q:

WhY does A variaBLe assiGnment not ThROw a RefERenceErROR wHen tHe variable is not deFInED - JavaScript

I've Tried tHiS In cHRomE, OpEra, MicrosoFt edge, INTernet EXPlORER anD mozilla FirefoX and still goTTen The samE cAse: a refereNceErRoR ExcEption is not ThroWn that the VariabLE I assigNEd a valuE is not DefIneD.

The SYnTaX is:
// whERe `iDEnTifIEr_nAme` was noT fOrMally DeclARED/ InitIalIzed.
(FunctIon() {})(identifier_NamE = 2)

Why DOes This bEhaviOr ocCuR?
Edit: just to Add, thIs Doesn't work if whaT is bEing assigNed Is A prOpErty oF An objeCt i.E.:
// ThRows a ReFerenceeRroR tHAT `ObJect_name` is not definEd.
(FUNcTion() {})(objeCt_name.PRoPeRTy_name = 2)

A:

THaTs wHat wE USed to Call THe Horror of ImplicIT gLoBals
You BaSicallY cReaTe a GlobaL VariAble by Accident. you caN "Use strict";mode tO Prevent that.
YoUR sECOnD SnipPet Does not work BecaUSe yoU are TRyIng TO acceSs a vaRiABlE That was not declared yEt, Which iS diffErent from assiGning to a vaRIABle that wAs noT DeCLared already (caUse thAt implicitLY declareS the vAriable).

 Q:

i'd like to sEE The diffeRenCe bEtwEen aNSwErs and QuestioNS When ReViewing

wheN reviewIng SugGesTed EdIts I'd like To be able To SeE wHeTheR it's aN Edited quEsTioN oR an EditeD Answer. becauSe edItS tO A quEstion tHAt APPear To AnSwer The QuEstioN, or cORreCt a bug tHat is the rOot OF the PrObLem, are cOnsidered bad aNd Edits to an aNsWer That imPROve of fix An answer are considered goOD. 
Now I haVe tO go to The aNswer or quEstIon undEr rEView to See whaT it is. 
whEn rEVIewinG "lOw quaLiTy Posts" you CAN seE what YoU are ReviewiNg:

A:

Look for asked ## minS Ago (For questions) oR
 people use.
If I have a s imple XMLdoc l ike  th is :
<a >
   <b1>
      <c>< /c>
    </b1>

    <b2 ></b2 >< /a>Wh at is  the ro o tn o de,  r oo t e le m en t and  do cumentelement? A reth ose all <a>? 
A :

In your  XM L:

a is the  do cument  e lem e nt, s ome times  calle d  the r oot eleme nt ,  which is sele c t ed  via  /a.
The parent o f  a is the documen t's ro ot no d e , w hic h is selec te d via /.

 Q: 
W h y doe s  a variable a ssignment n o t t hrow a  R efe r enceEr ror w he n  th e variableis n ot define d - Ja v aScript 
I've t ried t his  in  Chr o me ,Ope ra ,  Mi c ro sof t  Ed ge, Inte rn et  Expl orer a n d  Moz ill a Fi refox  and still go tte n th e  sa me ca se: A  Ref er enceE rror e xcept io n is not thrown  tha t the var iab le  Ias signe d  a val ueisnot def ined.
T hesy n t a xis:
// Where `iden ti f i er _name` w as not fo rm a lly decl ar ed/  ini t i alize d.
( f un ction(){})(id e nt if ier_nam e= 2)
Wh y d oes  this beha vior o ccur?
Ed it: J u st to add, thi s  doesn't work if w ha t  isbei ng assigned  isa  pro pert y  o f a n  obje ct i. e. : 
/ /  Throws a Reference Er ror th at `o bject_name` i s not defi n e d .
(funct ion( )  { } )(object_name. prope rty_name = 2)

A:
Thats  what we  used toc a ll the h orr orofimp l i ci t globals
You b asic al ly crea tea globa l v ari abl e b yaccident.  You can  " us est ric t";mo d e to pre ve ntth at. 
Your second  snip petdo es not  work b e ca u s e yo uar e tr yin gto ac cess a v ariable  that was  no t  dec la re d yet,which is diff er ent from a ss ign ing to a  variabl e that was not declared already  (c ausethat  implicit lydeclar est he var iable) .

 Q :
I' d liket o  s eeth e differen c e  be tween  A nswe rs andQuestions when rev i ewi ng

When revi ewi ng s u g ge ste d  e d its  I ' d l i k e to be able to  see wheth er it 's an edit e d q ue stion o r an ed iteda nswer.Because e dits to a  q uest i o n t hat appear  to answ er the qu e stion ,  o r cor rec t a bu gtha t isthe ro o t o f the  probl em , areconsi de red badand edits to an answerthat i mprov e o f fix anans w erare consi dere d good. 
N owI h ave t o g o  to t he a n sw ero r que stio n  under re v ie w t o se e what it i s . 
Wh en re vie w ing "L ow Q uality Posts" you can see what y ou a r e  re vie w ing: 
A:

Look for a ske d# #  mins ag o(for questi ons) or
 people_use.
If I_have a simple XML_doc like_this:
<a>
_ __<b1>
  _  _  <c></c>
 _  </b1>

__  <b2></b2>
</a>

What is the root node, root element and document element? Are those_all_<a>?

A:

In your_XML:

a_is_the document element, sometimes called_the root element, which is_selected via_/a.
The parent of a is the document's root_node,_which is selected_via /.

 Q:

Why does a variable assignment not throw_a ReferenceError when the variable is_not defined -_JavaScript

I've_tried_this in Chrome, Opera,_Microsoft Edge, Internet Explorer and Mozilla_Firefox and still gotten the same_case: A ReferenceError exception is not thrown_that the variable I assigned a_value is not defined.

The syntax_is:
// Where_`identifier_name` was not formally declared/_initialized.
(function() {})(identifier_name =_2)

Why does_this behavior occur?
Edit:_Just to add, this doesn't work_if what is_being assigned is a property of_an_object i.e.:
// Throws_a_ReferenceError_that `object_name`_is not defined.
(function()_{})(object_name.property_name_= 2)

A:

Thats_what_we used to call the horror_of_implicit globals
You basically create a global variable_by accident. You can_"use_strict";mode to prevent that.
Your_second snippet does not work_because you are trying to access_a variable_that was_not declared yet, which is different from assigning to a variable_that was not declared already (cause_that implicitly declares the_variable).

 Q:

I'd_like_to see the_difference_between Answers_and Questions when reviewing

When reviewing suggested edits_I'd like_to be able to see whether_it's an edited question_or_an edited answer. Because edits to_a question that appear to answer_the question, or correct a_bug_that_is the root of the_problem, are considered bad and edits_to an answer_that improve of fix an answer are_considered_good. 
Now I have to go_to_the answer or question under review_to_see_what it is. 
When reviewing_"Low Quality Posts" you can see_what you are reviewing:

A:

Look for asked ## mins ago_(for questions) or