无法将数组传递给函数

Question

我有一份合同：

pragma experimental ABIEncoderV2;

contract Ballot {
    constructor(string[] memory proposalNames) public {...}
}

我试过：

pragma solidity >=0.4.25 <0.6.0;
pragma experimental ABIEncoderV2;

import "truffle/Assert.sol";
import "truffle/DeployedAddresses.sol";
import "../contracts/voting.sol";

contract TestVoting {
    function testCounter() public {
        Ballot myContract = new Ballot(["foo", "bar"]);
    }
}

我有个错误：

TypeError: Invalid type for argument in function call. Invalid implicit conversion from string memory[2] memory to string memory[] memory requested.
        Ballot myContract = new Ballot(["foo", "bar"]);

我该怎么解决呢？

Answer 1

改变这一点：

constructor(string[] memory proposalNames)

对此：

constructor(string[2] memory proposalNames)

或者这个：

Ballot myContract = new Ballot(["foo", "bar"]);

对此：

string[] memory proposalNames = new string[](2);
proposalNames[0] = "foo";
proposalNames[1] = "bar";
Ballot myContract = new Ballot(proposalNames);