pragma solidity ^0.4.2;

contract Test {

    function toBytesNickJohnson(uint256 x) constant returns (bytes b) {

        b = new bytes(32);

        assembly { mstore(add(b, 32), x) }

    }

    function getStr(uint playChoice) returns (string s) {

        bytes memory c = toBytesNickJohnson(playChoice);

        return string(c);

    }

    function toBytesEth(uint256 x) constant returns (bytes b) {

        b = new bytes(32);

        for (uint i = 0; i < 32; i++) {

            b[i] = byte(uint8(x / (2**(8*(31 - i)))));

        }

    }

    function toBytesNicolasMassart(uint256 x) constant returns (bytes c) {

        bytes32 b = bytes32(x);

        c = new bytes(32);

        for (uint i=0; i < 32; i++) {

            c[i] = b[i];

        }

    }

}

pragma solidity ^0.4.2;

contract Test {

    function uint2str(uint i) internal returns (string c) {

        if (i == 0) return "0";

        uint j = i;

        uint length;

        while (j != 0){

            length++;

            j /= 10;

        }

        bytes memory bstr = new bytes(length);

        uint k = length - 1;

        while (i != 0){

            bstr[k--] = byte(48 + i % 10);

            i /= 10;

        }

        c = string(bstr);

    }

}