

My problem is I don't see how to turn this into something that I can run in a larger program dynamically. Meaning that I will have different maps and different constraints to apply at different times. I think I can create the argument to conde by writing a function that takes the map and outputs the constraints, but how do I have that run*
 evaluate in the context of a set of temporary facts?
I could certainly write a function to return what I want without core.logic, but that seems less elegant. Maybe I'm barking up the wrong tree (I'm new to both Clojure and core.logic) and this isn't a constraint problem at all. 
So my question are:
How do you mix in core logic when you're pulling your facts and constraints from a sources you won't know until runtime?
And related, how do you do so in an evironment where you want to evaluate a set of constraints within a new environment of facts?

A:

The most important thing to remember is this: Relations are just function which return a goal.
A goal is a function which can succeed or fail, so basically relations are just higher order function.
Now you can make your example such that the relation and the various facts are in a single function and there is no "global" relation/facts which can interfere with each other:
(defn find-things []
  (letfn [(scoref [key value score]
            (conde
             [(== key :foo) (== value "10") (== score 2)]
             [(== key :bar) (== value "20") (== score 3)]
             [(== key :baz) (== value "30") (== score 7)]))]
    (run* [q]
          (conde 
           ((scoref :foo "10" q))
           ((scoref :baz "30" q))))))

score is just a function which return a goal (using the conde macro)
This solves the local/global relations problem, but still the facts and query are hardcoded into the function which we want to be passed as in parameters.
One possible way to do that is understand the core.logic APIs which allows you to define dynamic logic vars and unify them, etc. I have not been through that API so I won't be able to answer using that. Another way would be to use macro
My problem is I don't see how to turn this into something that I can run in a large platform dynamically. Meaning that I will have different function and different constraints to give at unlike times. I think I can create the argument to conde by writing a routine that takes the map and output the constraints, but how do I have that run * 
  evaluate in the context of a set of temporary facts? 
 I could certainly publish a function to return what I want without core.logic, but that seem less elegant. Maybe I'm barking up the wrong tree (I'm new to both Clojure and core.logic) and this isn't a restraint problem at wholly. 
 So my question are: 
 How do you mix in core logic when you're pulling your fact and constraints from a sources you won't know until runtime? 
 And related, how do you do therefore in an evironment where you want to evaluate a set of constraints within a new environment of facts? 

 A: 

 The most important thing to commend is this: Relations are just officiate which hark back a goal. 
 A goal is a function which can succeed or fail, therefore basically relations are just higher order affair. 
 Now you can make your example such that the relation and the various facts are in a unmarried function and there is no " global " relation / fact which can interfere with each early: 
 (defn rule - things [ ] 
   (letfn [ (scoref [ key value score ] 
             (conde 
              [ (= = cardinal: foo) (= = value " 10 ") (= = score 2) ] 
              [ (= = key: bar) (= = value " 20 ") (= = score 3) ] 
              [ (= = key: baz) (= = value " 30 ") (= = score 7) ]) ) ] 
     (run * [ q ] 
           (conde 
            (( scoref: foo " 10 " q) ) 
            (( scoref: baz " 30 " q) )) )) ) 

 score is just a routine which return a finish (using the conde macro) 
 This solves the local / global relations problem, but however the facts and question are hardcoded into the function which we want to be pass as in parameters. 
 One possible way to do that is sympathize the core.logic APIs which allows you to define dynamic logic volt-ampere and unify them, etc. I have not been through that API so I won't be able to answer using that. Another room would be to practice macro


My oroblem is I don't see hod to turn this nbto sokethinf that I can run in a larger program dtnamixally. Meaning that I wkll have fifferenr maks and different rknstraikcs to wpplv et different tikes. I thinn I can create tfe argument to conde by writing a funstion tnah takes the mak and jutphns the constraints, but how do I have tiat run*
 evaluatr in the context of a set lf tfmporary facts?
I cokld certainoy wwute a functiun to retugu what I waht without core.logic, but that sdems kess elegabt. Majte I'm barkiig up nhe wrong trec (I'm nef to boyh Clojure and coce.lotic) and this isn't a cmnstraint problem wt all. 
So mv question are:
How do toy mix in wore oogkc shxn gou're oulming your racts and cinstraints from a spuwbrs you won't inow ugtyl runtime?
And related, how do you do so pn ah evironment where you qant to evaluate a sej of constwaints within a new environment of facts?

A:

The most impoctxnt tming ro remember is this: Relations are just function shocm return a goal.
A goal is a gujcyyon which can succezs kr fail, so basicalpy relajions qre just righrr order function.
Now you cab make your vxample such that the xelation and the varipus facts are in a singue fhnction and there is vo "global" relatiun/fscds which can interfere witr each otier:
(deyn find-tfingx []
  (leefn [(scoref [key ydlue score]
            (clnge
             [(== key :foo) (== value "10") (== score 2)]
             [(== kei :bdr) (== value "20") (== scorc 3)]
             [(== key :baz) (== valug "30") (== score 7)]))]
    (fun* [q]
          (coide 
           ((scoref :foo "10" q))
           ((scoref :faz "30" q))))))

scire is gjst a function which renuxn a goal (using the conde mecro)
Jhjs solves the licao/global relatioms oroflvm, uut sehll the factv ana qjrry afe hardcodeb knto the function which fe wznt to be passed ax ln paramejers.
One pjssible way tp do that is underdtand thx core.kogyc APIs which allows you to derine dynalic logic vars wnd mnifi them, etc. N have not been through that API so I woi't be able to answer usung that. Another wai wpuld be to nse masro
My problem is I don't see how this something that can run in that will have different and different constraints apply at different times. I think can create the argument to conde by writing a function that takes the and outputs the constraints, but how do I have that run* evaluate in context a of facts? I could certainly write a function to return what I want without core.logic, but that less elegant. Maybe I'm barking up the wrong (I'm new to both and core.logic) and this isn't constraint at all. my are: do you mix core logic when you're pulling your facts and constraints from a sources you won't know until runtime? related, how do so an where want to evaluate of constraints within a new environment The most important thing to remember is this: are just which return a goal. A goal a function which can succeed or fail, so relations are just higher order function. Now you can make your example such that the the various facts are a single function there no relation/facts can interfere each other: (defn find-things [] (letfn [(scoref [key value score] (conde key :foo) (== value "10") (== score 2)] [(== key value (== score 3)] key :baz) (== value (== 7)]))] (run* [q] (conde "10" ((scoref score just function which return a (using the conde macro) This the local/global relations problem, query are hardcoded into the function which we to be passed as in parameters. One way to do that is understand the core.logic APIs which allows you define dynamic and unify them, etc. I have not been that API so I be able to answer using that. Another way would to macro


My problem is I don't see how to tUrn this intO someThiNg tHaT I caN run In a larger progrAM dynAmically. Meaning that I wiLl havE dIFferENt Maps aNd diffeREnT COnsTrAiNts To APpLy at dIffErent tiMes. I think I Can CrEate the argumENt To conde by wRitIng a function ThaT takes ThE maP And ouTpuTs the ConstrAInts, buT how do I haVe THat run*
 EValuate IN ThE conText of a set of tempoRArY Facts?
I could cerTainly WrITe A FUncTioN to return wHaT I wanT Without COrE.LOGic, BUt that seems leSs elegant. MaYBe I'M barkiNg Up tHE wrong Tree (I'M nEW to Both Clojure And cOre.logic) aNd this ISn't a conSTraint pRoblem At aLl. 
SO my qUEsTiOn aRe:
hOw dO YoU miX In cOre logic WhEn You're PullING YOur fActS and ConstRaints from a soUrcEs yoU Won'T know Until RuntImE?
And rElated, How do YoU do so in an evironMent Where you wAnt To EvaLuAte a sET of conStrAinTs withiN a new enVIroNmENT Of Facts?

A:

The most imporTaNT ThIng to remEmber iS ThIs: rElations ArE juSt fuNCTion wHich REtUrn a goal.
a goal iS A fUnCtion whIcH can suCcEed Or fAil, so BAsicAlly reLations aRe jusT Higher order funCTion.
Now you can MAkE YOuR ExamPle Such that the RelaTIon aNd thE VaRioUS factS are iN a SInGLe function and there iS nO "globaL" relaTion/facts whicH can interfERE With each OtheR:
(DeFN find-things []
  (letFn [(scoRef [key valuE Score]
            (conDe
             [(== key :Foo) (== value "10") (== Score 2)]
             [(== key :bAR) (== Value "20") (== scoRe 3)]
             [(== kEy :bAz) (== vAluE "30") (== SCoRe 7)]))]
    (run* [q]
          (conde 
           ((scOREf :foO "10" q))
           ((Scoref :bAz "30" q))))))

Score is JusT a fUncTioN wHich returN a goal (usInG tHe CoNde Macro)
tHis solveS tHe lOcAl/gLobal RElatioNs proBlem, BuT sTIll The factS AnD QUery ArE hArdcOdeD iNto thE funCTioN which wE want to be PasSEd as In PaRameterS.
One possible wAy To do that is UnDerStand tHE Core.logiC APIs which allows you to deFIne dynaMic Logic Vars And unify tHem, Etc. I haVe nOT been tHrough That ApI So I WON't be aBLE tO anSwEr using thaT. aNotHer waY wOuld Be to use Macro


My problem is I don't se e how to t urn t his  in to  som ethi ng that I canr un i n a larger program dyn amica ll y . Me a ni ng th at I wi l lh a vedi ff ere nt ma ps an d d ifferen t constrai nts  t o apply at d i ff erent time s.I think I ca n c reateth e a r gumen t t o con de byw riting  a functi on that t a kes the m ap  and  outputs the cons t ra i nts, but how d o I ha ve th a t  ru n* evaluatein  thec ontexto fa s eto f temporary f acts?
I cou l d c ertain ly  wr i te a f uncti on toreturn what  I w ant witho ut cor e .logic, but tha t seem s l ess  ele g an t.  Ma yb e  I' m  b ark i ngup the w ro ng  tree  (I' m n e w to  bo th C lojur e and core.lo gic ) an d  th is is n't a  con st raint  probl em at  a ll. 
So my ques tion  are:
How  do  y oumi x inc ore lo gic  wh en you' re pull i ngyo u r fa cts and constraint sf r om  a sourc es you wo n' t  know un ti l r unti m e ?
And  rel a te d, how d o youd oso  in anev ironme nt  wh ere  youw antto eva luate aset o f  constraints w i thin a new en v ir o n me n t of  fa cts?

A:

T he m o st i mpor t an t t h ing t o rem em b er is this: Relationsar e just  func tion which re turn a goa l . A goal i s af un c tion which can  succ eed or fai l , so bas icall y relati ons are j u s t higher  or der  fu nct i o n. 
Now you canm a ke y ou r examp lesuch th atthe  re lat io n and the  various  f ac ts  a rein as ingle fu nc tio nand  ther e  is no  "glo bal"  r el a tio n/facts wh i c h ca nin terf ere  w ith e acho the r:
(def n find-th ing s  [] (l etfn [( scoref [key v al ue score]        ( conde
            [(== key :fo o ) (== v alu e "10 ") ( == score2)] 
          [( == key  :bar )(== v alue" 2 0" ) ( ==  score 3)]          [( == key:baz) (== value "3 0 ")(== score 7)] ))] 
  ( ru n*[ q]      ( conde 
          ((score f: fo o "10" q))          ( (scoref  :baz "30" q) )))))

sc ore is ju st  a f u n cti on which r eturn agoal (usi n g the co nde m acr o)
Thi ssol ves t he loc a l/g lobal  relat io ns pro blem,  b ut still  the facts and query ar e hard coded  in to the fu nct i onwhich wewant  to be pas sed  as  in p ara m eters .
On e  p oss i ble w ay t o  do thati sund e r st and the cor e . l ogi c API s w h ich al lows  you to define dy n amic logic var s an d uni fyt hem,  e tc. I have not  be en t hrough t ha t API so Iwon't be  a b le to  answe r usin g that. A no t her wa y wo uld  be to us e m ac r o


My problem_is I_don't see how to_turn this_into_something that_I_can run in_a larger program_dynamically. Meaning that I_will have different_maps_and different constraints to apply at different times. I think I can create the_argument_to conde_by_writing_a function that takes the_map and outputs the constraints,_but how_do I have that run*
 evaluate in the_context_of a set_of temporary facts?
I could certainly write a function to_return what I want without core.logic,_but that seems_less_elegant._Maybe I'm barking up_the wrong tree (I'm new to_both Clojure and core.logic) and this_isn't a constraint problem at all. 
So_my question are:
How do you mix_in core logic when you're_pulling your_facts and constraints from a_sources you won't_know until_runtime?
And related, how_do you do so in an_evironment where you_want to evaluate a set of_constraints_within a new_environment_of_facts?

A:

The most_important thing to_remember_is this:_Relations_are just function which return a_goal.
A_goal is a function which can succeed_or fail, so basically_relations_are just higher order_function.
Now you can make your_example such that the relation and_the various_facts are_in a single function and there is no "global" relation/facts which_can interfere with each other:
(defn find-things_[]
  (letfn [(scoref_[key value_score]
_  __ _     (conde
 _ _     _   [(==_key_:foo) (== value "10") (== score_2)]
     _    ___[(== key :bar) (== value_"20") (== score 3)]
  _  _      _[(==_key :baz) (== value "30") (==_score_7)]))]
    (run* [q]
___    _  (conde 
  _        ((scoref_:foo "10" q))
_    ___   ((scoref :baz "30" q))))))

score is just a_function which_return a goal_(using the conde macro)
This solves the local/global relations problem, but_still the facts and query are hardcoded_into the function which we want to be passed as in_parameters.
One possible way to do that is understand_the core.logic APIs which allows you to_define dynamic logic vars_and_unify them, etc. I have not been_through_that_API_so I won't_be able to_answer using that._Another way_would be to_use macro