Solidity dynamic array assembly

dynamic-array-yul.sol

function readBigArrayLocation(uint256 index) external view returns (uint256 ret) {
    uint256 slot;
    assembly{
        slot := bigArray.slot
    }
    bytes32 location = keccak256(abi.encode(slot));

    assembly{
        ret := sload(add(location, index))
    }
}