Finding repeated items in a array using array manipulation methods

SystemVerilog
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2

In reply to sasi_8985:

This is more like a puzzle (code will need comments for others to understand) Based on your definition, I can’t be sure what classifies as “array manipulation methods” and what does not. Am i forced to use them ? Or can I ignore them if i chose to ?
I didn’t chase fixing your code.

Speaking for efficiency, the below 1-pass method looks more efficient. Of course, I am using a helper Associative Array here. (You can avoid the helper associate array, and chose to do a unique at the end, like in your code).


module tb;
 
  int c[$] = '{1,3,1,2,3,6};
 
  int fin[$];
  int y;
  int a[int];
  initial
    begin
      foreach(c[i]) begin
        if(a.exists(c[i])) begin
          if(a[c[i]]==1) begin fin.push_back(c[i]); a[c[i]]=2; end
          if(a[c[i]]==2) continue;
        end
        else a[c[i]]=1;
      end
      
      $display("%p",fin);
    end

endmodule