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solidity | 拼接两个 string

 2 years ago
source link: https://benpaodewoniu.github.io/2022/07/08/solidity45/
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solidity | 拼接两个 string

拼接字符串。

这里并没有使用 openzeppelin 提供的方法，而是，使用了原始的写法，直接调用就好了。

function strConcat(string memory _a, string memory _b) public pure returns (string memory){
    bytes memory _ba = bytes(_a);
    bytes memory _bb = bytes(_b);
    string memory ret = new string(_ba.length + _bb.length);
    bytes memory bret = bytes(ret);
    uint k = 0;
    for (uint i = 0; i < _ba.length; i++) bret[k++] = _ba[i];
    for (uint i = 0; i < _bb.length; i++) bret[k++] = _bb[i];
    return string(ret);
}

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