Member "Push" not found... I tried to run my code the same way I did earlier with the Strings but this time with uints and it didn't work. New to Sol - solidity

Question

I'm new to solidty so any new keyword is appreciated. I like the language so far, the syntax is close to Java and C#. I'm still a college student and the lack of info about solidity is a killer. I hope someone can help :/
pragma solidity ^0.8.7;
contract MyTestContarct{
Person[] public people;
uint256 public peopleCount;
struct Person {
string _firstName;
string _lastName;
}
function addPerson(string memory _firstName, string memory _lastName) public{
people.push(Person(_firstName, _lastName));
peopleCount +=1;
}
uint[] IntArrayTest;
uint256 public elementsCounter;
struct Numbers{
uint _number;
}
function addElements(uint _number) public{
IntArrayTest.push(Numbers(_number));
elementsCounter +=1;
} //It worked with string, why not with uint?
}

Answer 1

IntArrayTest is of type uint[] (array of unsigned integers), so you can only push uint items to this array.
However Numbers(_number) is not an uint - its type is Numbers.
You can create a Numbers variable in memory, and then pass its _number member (which has the uint type) to the IntArrayTest array.
uint[] IntArrayTest;
function addElements(uint _number) public{
Numbers memory numbers = Numbers(_number);
IntArrayTest.push(numbers._number);
elementsCounter +=1;
}
Or if you want to pass the Numbers type to an array, you'll need to delcare an array of this type.
struct Numbers{
uint _number;
}
Numbers[] NumbersArrayTest;
function addElements(uint _number) public{
NumbersArrayTest.push(Numbers(_number));
elementsCounter +=1;
}