Transfer asset

transfer.sol

pragma solidity ^0.4.11;

contract Test {
    mapping (address => address[]) owner2assets;
    mapping (address => address) asset2owner;
    event ConstructorCall(string);
    
    function Test () public {
        owner2assets[msg.sender] = [0x661d576d9486cb7699648518a364d95301ecea6d,
                                    0x3e11f1942810f0f64325e29fba754c34cb80a5a5];

        asset2owner[0x661d576d9486cb7699648518a364d95301ecea6d] = msg.sender;
        asset2owner[0x3e11f1942810f0f64325e29fba754c34cb80a5a5] = msg.sender;
        ConstructorCall("hey");
    }
    
    function addOneAsset(address _asset) public {
        owner2assets[msg.sender].push(_asset);
        asset2owner[_asset] = _asset;
    }
    
    function transferAsset(address _nextOwner, address _assetId) {
        assert(asset2owner[_assetId] == msg.sender);

        address[] storage myAssets = owner2assets[msg.sender];
    
        // todo: iterate over owner2assets[msg.sender] and remove current id
        for (uint i = 0; i < myAssets.length; i++) {
            if (myAssets[i] == _assetId) {
                myAssets[i] = myAssets[myAssets.length - 1];
                break;
            }
        }
        
        assert(myAssets.length > uint(0));
        myAssets.length -= 1;

        owner2assets[_nextOwner].push(_assetId);
        asset2owner[_assetId] = _nextOwner;
    }
    
    function myAssets() public returns (address[]) {
        return owner2assets[msg.sender];
    }
    
    function myAssetsLength() public returns (uint256) {
        return owner2assets[msg.sender].length;
    }
}