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//Write your own contracts here. Currently compiles using solc v0.4.15+commit.bbb8e64f.
pragma solidity ^0.4.21;
contract SimpleStore {
  struct slice {
    uint _len;
    uint _ptr;
  }

function toSlice(string memory self) internal pure returns (slice memory) {
    uint ptr;
    assembly {
        ptr := add(self, 0x20)
    }
    return slice(bytes(self).length, ptr);
  }

function testStartsWith(string memory needle, string memory haystick) public pure returns (bool) {
        slice memory needleSlice = toSlice(needle);
        slice memory haystickSlice = toSlice(haystick);
        return startsWith(haystickSlice, needleSlice);
    }

uint value;
}