code: public static int[] append(int lhs, int[] rhs) {
  		int[] rs = new int[rhs.length+1];
  		rs[0] = lhs;
  		System.arraycopy(rhs, 0, rs, 1, rhs.length);
  		return rs;
  	}
docs: Append an integer item to the front of an array of integer type together,
  producing a fresh array whose length equals that the second plus one.
  
  @param lhs
  The left-hand side. Elements of this array will be copied
  first into the resulting array.
  @param rhs
  The right-hand side. Elements of this array will be copied
  last into the resulting array.
  @return