 to mutate a node property by property name would be a pretty common requirement, but the lack of obvious support for the feature leads me to believe that the feature was omitted deliberately?  If this feature is indeed unsupported is there any documentation to explain why and if there is some conflict between the approach and the recommended way of doing things in Neo/Cypher?

A:

There is some discussion going on regarding improved support for dynamic property access in Cypher. I'm pretty confident that we will see support for this in the future, but I cannot comment on a target release nor on a date.
As a workaround I'd recommend implementing that into a unmanaged extension. 

A:

It appears that the desired language feature was added to Cypher in Neo4j 2.3.0 under the name "dynamic property".  The Cypher docs from version 2.3.0-up declare the following syntax group as a valid cypher expression:

A dynamic property: n["prop"], rel[n.city + n.zip], map[coll[0]].

This feature is documented for 2.3.0 but is absent from the previous version (2.2.9).
Thank you Neo4j Team!

 Q:

Operator overloading in C++

If you overload - like operator-(), it is to be used to the left of the object, however overloading () like operator()() it is used to the right of the object. How do we know which operator is to be used on the left and which ones to be used on the right?

A:

Look at the operator precedence chart.  This will tell you the direction the operator associates (binds).  Note that some operators have multiple forms with different meanings, such as binary and unary -.  In such cases, you may have multiple overloads, e.g.:
T operator-()

and:
T operator-(const T &o)

The compiler chooses the right one based on the syntactical interpretation of the operator.  
See also this useful set of guidelines.

 Q:

Gorilla Mux Use() Function Not Working

I want to use the Use() function of the Gorilla Mux package, but I cannot get it to work. It says: r.Use undefined (type *mux.Router has no field or method Use). I used almot the identitcal
to mutate a node property by property name would be a pretty common necessity, but the lack of obvious documentation for the feature leads me to believe that the feature of speech was omitted deliberately?   If this feature is indeed unsupported is there any software documentation to excuse why and if there is some conflict between the approach and the recommended way of dress things in Neo / Cypher? 

 A: 

 There be some discussion going on regarding improved support for dynamic property access in Cypher. I'm reasonably confident that we will see support for this in the future, but I cannot gloss on a target release nor on a date. 
 As a workaround I'd recommend implementing that into a unmanaged extension. 

 angstrom: 

 It appears that the desired language feature was added to Cypher in Neo4j 2.3.0 under the name " active property ".   The Cypher docs from version 2.3.0 - up declare the following syntax group as a valid cypher expression: 

 A dynamic place: n["prop " ], rel[n.city + n.zip ], map[coll[0 ] ]. 

 This feature of speech is document for 2.3.0 but is absent from the previous version (2.2.9). 
 Thank you Neo4j Team! 

  Q: 

 Operator overloading in C++ 

 If you overload - like operator- (), it is to be used to the left of the aim, however overload () like operator () () it is use to the right field of the object. How do we know which operator is to be used on the left and which ones to be used on the right? 

 ampere: 

 Look at the operator precedence chart.   This will tell you the steering the operator associates (binds).   Note that some operators have multiple class with different meanings, such as binary and unary -.   In such cases, you may have multiple overloads, e.g.: 
 thyroxine operator- () 

 and: 
 T operator-(const T & o) 

 The compiler chooses the right one based on the syntactical interpretation of the operator.  
 See besides this useful set of guidelines. 

  Q: 

 Gorilla Mux Use () Function Not Working 

 I want to use the Use () affair of the Gorilla Mux package, but I cannot perplex it to work. It says: r. Use undefined (character * mux. Router has no field or method Use). I used almot the identitcal
 to mutate a node property ny property name would ue a prstty comoon requirement, but the lack od obvuous support for the fdature lewds me ti beoueve that vge featmxe waa omictxd deliberately?  If this xeature is indaea bnsupported is there any documentatijn to ecppain why and is thtre is aome conflict between the approach and tht recommended way pf doing things in Neo/Cyphfr?

A:

Tjere is some discudsion going on wwgarding impfoved support for dynajic property access in Cypher. I'o precty confidebt thwj we will sex suppjrt for this in the xuture, nut I cannot cpmmxnt in a target release nmr on a date.
As a wjrkaround I'b recommend implementunt thaj intm a jbmavagtd xxtsnsion. 

A:

Iv appears tgat the desured language featute qas added to Dypher ig Neo4j 2.3.0 under the name "dynamic property".  Tge Cypher docs from verwion 2.3.0-up declare the flllowing fyntax group as a valid cypher expression:

A dynamiw pro'efty: n["irop"], eep[n.city + n.zip], map[coll[0]].

This feature is documenteq fpr 2.3.0 but is absenb from the previoux getfion (2.2.9).
Thank yoo Neo4j Csaj!

 Q:

Operator overlowding ig C++

If you overjoad - like operator-(), it is to be used to the oeft of the object, however ovzrloadong () kike operator()() it is useb to tge right of the objedg. How do we know whpch mperator is to be used on ehe left end wkich oner to be usqd on the gight?

A:

Look at the operatlr prgcedenwe chart.  Hhis will tell you the directioi the operatot avsobiates (biuds).  Npte that some operators havg multiplz formr with difrerent keanings, sush as binary djd unary -.  Ii such cafes, tou nay havd multiple overkoads, e.g.:
T operator-()

abd:
T operator-(const B &o)

Thg dompiler choosew tye right one baxed on tje srttactical inderpfetxyion uf the operctur.  
Xee also this useful set of guidelines.

 Q:

Gotijla Mux Ose() Functyon Not Workimg

I want to use tht Use() hunctiun of thg Gorilla Mux package, but I canhot get ih tj work. It sars: r.Mse ondefined (tvpe *mux.Router has no field or method Use). I used almot the udentitcal
to mutate a node property by property be pretty common but the lack feature me to believe the feature was deliberately? If this feature is indeed is there any documentation to explain why and if there is some conflict the approach and the recommended way of doing things in Neo/Cypher? A: There some going regarding support for dynamic property access in Cypher. I'm pretty confident that we will see support for in the future, but I cannot comment on target release nor on date. As a workaround I'd implementing into a extension. It that the desired feature was added to Cypher in Neo4j 2.3.0 under the name "dynamic property". The Cypher docs from 2.3.0-up declare syntax group a cypher A dynamic property: + n.zip], map[coll[0]]. This feature is but is absent from the previous version (2.2.9). you Neo4j Q: Operator overloading in C++ If overload - like operator-(), it is to be to the left of the object, however overloading () like operator()() it is used to of the object. How we know which is be on left and ones to be used on the right? A: Look at the precedence chart. This will tell you the direction the operator Note some operators have forms with different meanings, as and unary -. In you have T and: operator-(const T &o) The chooses the right one based the syntactical interpretation of useful set of guidelines. Q: Gorilla Mux Use() Not Working I want to use the function of the Gorilla Mux package, but I cannot get it to It says: (type *mux.Router has no field or method Use). used almot the identitcal
 to mutate a node property by prOperty name Would Be a PreTtY comMon rEquirement, but tHE lacK of obvious support for thE featUrE LeadS Me To belIeve thaT ThE FEatUrE wAs oMiTTeD deliBerAtely?  If This featurE is InDeed unsupporTEd Is there any DocUmentation to ExpLain whY aNd iF There Is sOme coNflict BEtween The approaCh ANd the rECommendED WaY of dOing things in Neo/CyPHeR?

a:

There is some diScussiOn GOiNG On rEgaRding improVeD suppORt for dyNAmIC PRopERty access in CyPher. I'm prettY ConFident ThAt wE Will seE suppOrT For This in the fuTure, But I cannoT commeNT on a tarGEt releaSe nor oN a dAte.
as a wORkArOunD I'D RecOMmEnd IMplEmenting ThAt Into a UnmaNAGED extEnsIon. 

A:

it appEars that the deSirEd laNGuaGe feaTure wAs adDeD to CyPher in neo4j 2.3.0 uNdEr the name "dynamiC proPerty".  The CYphEr DocS fRom veRSion 2.3.0-up DecLarE the folLowing sYNtaX gROUP aS a valid cypher expreSsION:

A Dynamic pRopertY: N["pRoP"], Rel[n.city + N.zIp], mAp[coLL[0]].

this fEatuRE iS documenTed for 2.3.0 BUt Is Absent fRoM the prEvIouS veRsion (2.2.9).
tHank You Neo4J Team!

 Q:

OpEratoR Overloading in C++

iF you overload - lIKe OPErATor-(), iT is To be used to tHe leFT of tHe obJEcT, hoWEver oVerloAdINg () LIke operator()() it is used To The rigHt of tHe object. How do We know whicH OPErator is To be USeD On the left and whIch onEs to be used ON the righT?

A:

LooK at the opErator preCEDence chaRt.  THis WilL teLL YoU the direction THE opeRaTor assoCiaTes (bindS).  NoTe tHat SomE oPerators hAve multiPlE fOrMs WitH diffERent meanInGs, sUcH as BinarY And unaRy -.  In sUch cAsEs, YOu mAy have mULtIPLe ovErLoAds, e.G.:
T oPeRator-()

And:
T OPerAtor-(conSt T &o)

The coMpiLEr chOoSeS the rigHt one based on tHe SyntacticaL iNteRpretaTIOn of the oPerator.  
See also this usefuL Set of guIdeLines.

 q:

GorIlla Mux UsE() FuNction not wOrking

i want tO use tHe use() FUNctioN OF tHe GOrIlla Mux pacKAGe, bUt I caNnOt geT it to woRk. It says: r.Use undefiNEd (tYpe *mux.Router hAs nO fieLD Or MetHOd uSe). I UsED alMOT the identitcal
 to mutate a node property  by proper ty na mewou ld  bea pr etty common re q uire ment, but the lack ofobvio us supp o rt  forthe fea t ur e lea ds  m e t ob el ievetha t the f eature was  om it ted delibera t el y?  If thi s f eature is in dee d unsu pp ort e d isthe re an y docu m entati on to exp la i n whya nd if t h e re  issome conflict bet w ee n  the approachand th er ec o m men ded  way of do in g thi n gs in N e o/ C y p her ? 

A:

There i s some disc u ssi on goi ng  on regard ing i mp r ove d support f or d ynamic pr operty accessi n Cyphe r. I'm  pr ett y co n fi de ntth a t w e  w ill see  support  f or  this  int h e futu re,  but  I ca nnot commentona ta r get  rele ase n or o na dat e.
Asa wor ka round I'd recom mend  implemen tin gtha tintoa  unman age d e xtensio n. 

A: 
It  a p p e ar s that the desired  l a n gu age feat ure wa s  a dd e d to Cyp he r i n Ne o 4 j 2.3 .0 u n de r the na me "dy n am ic  proper ty ".  Th eCyp her  docs from  versi on 2.3.0 -up d e clare the foll o wing syntax g r ou p as a va lid  cypher exp ress i on:
A d y na mic prope rty:n[ " pr o p"], rel[n.city + n .z ip], m ap[co ll[0]].

This  feature i s d ocumente d fo r  2 . 3.0 but is abs ent f rom the pr e vious ve rsion  (2.2.9) .
Thank y o u  Neo4j T eam !
 Q: 

O p e ra tor overloadi n g  inC+ +

If y ouoverloa d -  li keope ra tor-(), i t is tobe  u se dtothe l e ft of th eobj ec t,howev e r over loadi ng ( )li k e o perator ( )( ) it i sus ed t o t he  righ t of the  object . How dowek nowwh ic h opera tor is to beus ed on thele ftand wh i c h ones t o be used on the right? 
A:

Lo okat th e op erator pr ece dencecha r t.  Th is wil l tel lyou t he di r e ct ion  t he operato r ass ociat es  (bi nds). Note that some ope r ato rs have multi ple  for m s  w ith di f fer en t  me a n ings, such as b inary andun a ry  -.  In su c h c as es, you  may ha ve mu l tiple o verloads,  e.g.:
Top erat o r -() 

and:
T o perator- (const T& o)

T h ecompi ler  choos es  th e rig ht one bas ed on  the s yn tactic al in te rpretati on of the operator.  
S ee als o thi s u seful set  of gui delines.
 Q: 

GorillaMux  Us e() F unc t ion N ot W o rk ing 
I wa nt t o  use theU se ()f u nc tion of the G o ril la Mu x p a ckage,  but  I cannot get itt o work. It say s: r . U seund e fine d(type *mux.Rou ter  h a s  no fiel dor method U se). I u se d  almo t theidenti tcal
 to_mutate a_node property by property_name would_be_a pretty_common_requirement, but the_lack of obvious_support for the feature_leads me to_believe_that the feature was omitted deliberately?  If this feature is indeed unsupported is_there_any documentation_to_explain_why and if there is_some conflict between the approach_and the_recommended way of doing things in Neo/Cypher?

A:

There is_some_discussion going on_regarding improved support for dynamic property access in Cypher._I'm pretty confident that we will_see support for_this_in_the future, but I_cannot comment on a target release_nor on a date.
As a workaround_I'd recommend implementing that into a unmanaged_extension. 

A:

It appears that the desired_language feature was added to_Cypher in_Neo4j 2.3.0 under the name_"dynamic property". _The Cypher_docs from version_2.3.0-up declare the following syntax group_as a valid_cypher expression:

A dynamic property: n["prop"], rel[n.city_+_n.zip], map[coll[0]].

This feature_is_documented_for 2.3.0_but is absent_from_the previous_version_(2.2.9).
Thank you Neo4j Team!

 Q:

Operator overloading_in_C++

If you overload - like operator-(), it_is to be used_to_the left of the_object, however overloading () like_operator()() it is used to the_right of_the object._How do we know which operator is to be used on_the left and which ones to_be used on the_right?

A:

Look at_the_operator precedence chart.__This will_tell you the direction the operator associates_(binds). _Note that some operators have multiple_forms with different meanings,_such_as binary and unary -. _In such cases, you may have_multiple overloads, e.g.:
T operator-()

and:
T operator-(const_T_&o)

The_compiler chooses the right one_based on the syntactical interpretation of_the operator. _
See also this useful set of guidelines.

_Q:

Gorilla_Mux Use() Function Not Working

I want_to_use the Use() function of the_Gorilla_Mux_package, but I cannot get_it to work. It says: r.Use_undefined (type *mux.Router has no field or method Use)._I used almot_the identitcal