Sort array in solidity, could be easily used to sort any array of integers too

bytesSort.sol

pragma solidity ^0.4.0;
contract ArraySort {
    function sort_array(bytes memory arr) private pure returns (bytes) {
        uint256 l = arr.length;
        for(uint i = 0; i < l; i++) {
            for(uint j = i+1; j < l ;j++) {
                if(arr[i] > arr[j]) {
                    bytes1 temp = arr[i];
                    arr[i] = arr[j];
                    arr[j] = temp;
                }
            }
        }
        return arr;
    }
}