pragma solidity ^0.5.4;

contract AddressSetHaver {
  uint[] public testList = [1,2,3,4,5,6];
  uint[] public smallList = [5];

  function emptySmallList() public {
      smallList.length --;
  }

  function wontonlyLengthenTheSmallList() public {
      smallList.length ++;
  }

  function pumpSmallList(uint x) public {
      smallList.push(x);
  }

  function smallListLength() public returns(uint) {
      return smallList.length;
  }

  function yee(uint [] memory bacon) public returns(bool[] memory) {
      bool[] memory copy = new bool[](bacon.length);
      copy[bacon.length -1] = true;
      return copy;
  }

  function add(uint element) public returns (uint) {
    if ( contains(element) ) {
      return testList.length;
    } else {
      return testList.push(element);
    }
  }

  function contains(uint element) public view returns (bool) {
    uint len = testList.length;
    for(uint i = 0; i < len; i++) {
      if(testList[i] == element) {
        return true;
      }
    }
    return false;
  }

  function length() public view returns (uint) {
    return testList.length;
  }
}