From 432aa79e61c1fbfa2ef962510167068fa9c3172d Mon Sep 17 00:00:00 2001
From: gxcoder <47691898+gxcoder@users.noreply.github.com>
Date: Wed, 9 Feb 2022 18:42:52 -0500
Subject: [PATCH] Suggestion for higher solidity version

Operation push has changed behavior since since solidity 0.6. It no longer returns the length but a reference to the added element.
---
 lesson-1/chapter-13/Contract.sol | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/lesson-1/chapter-13/Contract.sol b/lesson-1/chapter-13/Contract.sol
index 8e834a2..7fed6be 100644
--- a/lesson-1/chapter-13/Contract.sol
+++ b/lesson-1/chapter-13/Contract.sol
@@ -15,7 +15,8 @@ contract ZombieFactory {
     Zombie[] public zombies;
 
     function _createZombie(string _name, uint _dna) private {
-        uint id = zombies.push(Zombie(_name, _dna)) - 1;
+        zombies.push(Zombie(_name, _dna));
+        uint id = zombies.length - 1;
         emit NewZombie(id, _name, _dna);
     }
 
@@ -29,4 +30,4 @@ contract ZombieFactory {
         _createZombie(_name, randDna);
     }
 
-}
\ No newline at end of file
+}