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  1. :- set_prolog_flag(verbose,silent).
  2. :- prompt(_, '').
  3. :- use_module(library(readutil)).
  4.  
  5. hash_update(X,Y2,Xs,[[X,Y2]|Xs2]):-select([X,_],Xs,Xs2).
  6.  
  7.  
  8. main:-
  9. 	process,
  10. 	halt.
  11.  
  12. process:-
  13. 	/* your code goes here */
  14. 	hash_update(b,3,[[a,1],[b,2],[c,3]],Ans),
  15. 	write(Ans),
  16. 	true.
  17.  
  18. :- main.
Success #stdin #stdout 0.07s 7124KB
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stdin
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Standard input is empty
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[[b,3],[a,1],[c,3]]
https://ideone.com/Yf11ni
language:
Prolog (swi 7.6.4)
created:
25 days ago
visibility:
public

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