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actions |
material |
Putting It Together |
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startingCode |
answer |
sol |
pragma solidity >=0.5.0 <0.6.0;
contract ZombieFactory {
uint dnaDigits = 16;
uint dnaModulus = 10 ** dnaDigits;
struct Zombie {
string name;
uint dna;
}
Zombie[] public zombies;
function _createZombie(string memory _name, uint _dna) private {
zombies.push(Zombie(_name, _dna));
}
function _generateRandomDna(string memory _str) private view returns (uint) {
uint rand = uint(keccak256(abi.encodePacked(_str)));
return rand % dnaModulus;
}
// start here
}
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pragma solidity >=0.5.0 <0.6.0;
contract ZombieFactory {
uint dnaDigits = 16;
uint dnaModulus = 10 ** dnaDigits;
struct Zombie {
string name;
uint dna;
}
Zombie[] public zombies;
function _createZombie(string memory _name, uint _dna) private {
zombies.push(Zombie(_name, _dna));
}
function _generateRandomDna(string memory _str) private view returns (uint) {
uint rand = uint(keccak256(abi.encodePacked(_str)));
return rand % dnaModulus;
}
function createRandomZombie(string memory _name) public {
uint randDna = _generateRandomDna(_name);
_createZombie(_name, randDna);
}
}
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We're close to being done with our random Zombie generator! Let's create a public function that ties everything together.
We're going to create a public function that takes an input, the zombie's name, and uses the name to create a zombie with random DNA.
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Create a public function named createRandomZombie. It will take one parameter named _name (a string with the data location set to memory). (Note: Declare this function public just as you declared previous functions private)
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The first line of the function should run the _generateRandomDna function on _name, and store it in a uint named randDna.
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The second line should run the _createZombie function and pass it _name and randDna.
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The solution should be 4 lines of code (including the closing } of the function).