how to replace the first and last occurrences of number with other in prolog









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repf(B,A,[A|Y],[B|Y]):-repf(B,A,Y,L),L=[B].
repf(B,A,[X|Y],L):- repf(B,A,Y,L1), L=[X|L1].

repf(B,A,[A],[B]).


How to make this code replace the first and last occurrence of a specific value with another?










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    repf(B,A,[A|Y],[B|Y]):-repf(B,A,Y,L),L=[B].
    repf(B,A,[X|Y],L):- repf(B,A,Y,L1), L=[X|L1].

    repf(B,A,[A],[B]).


    How to make this code replace the first and last occurrence of a specific value with another?










    share|improve this question









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      up vote
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      down vote

      favorite









      up vote
      0
      down vote

      favorite











      repf(B,A,[A|Y],[B|Y]):-repf(B,A,Y,L),L=[B].
      repf(B,A,[X|Y],L):- repf(B,A,Y,L1), L=[X|L1].

      repf(B,A,[A],[B]).


      How to make this code replace the first and last occurrence of a specific value with another?










      share|improve this question









      New contributor




      Rama is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.











      repf(B,A,[A|Y],[B|Y]):-repf(B,A,Y,L),L=[B].
      repf(B,A,[X|Y],L):- repf(B,A,Y,L1), L=[X|L1].

      repf(B,A,[A],[B]).


      How to make this code replace the first and last occurrence of a specific value with another?







      prolog






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      Rama is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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      share|improve this question









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      share|improve this question




      share|improve this question








      edited Nov 11 at 12:34









      false

      10.9k769140




      10.9k769140






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      asked Nov 10 at 12:34









      Rama

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