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About Lua

Lua is a lightweight, high-level programming language designed for embedded use in applications.

About C++

C++ is a general-purpose programming language created by Bjarne Stroustrup as an extension of the C programming language, or "C with Classes".

Palindrome Check Example: Lua vs C++

Palindrome Check in Lua

function isPalindrome(str)
    local clean = string.lower(string.gsub(str, "[^%w]", ""))
    return clean == string.reverse(clean)
end

-- Example usage
print(isPalindrome("A man, a plan, a canal: Panama")) -- true
print(isPalindrome("race a car")) -- false

Palindrome Check in C++

#include <iostream>
#include <string>
#include <algorithm>
using namespace std;

bool isPalindrome(string str) {
    string clean;
    // Keep alphanumeric chars and convert to lowercase
    for(char c : str) {
        if(isalnum(c)) {
            clean += tolower(c);
        }
    }
    
    string reversed = clean;
    reverse(reversed.begin(), reversed.end());
    return clean == reversed;
}

int main() {
    cout << boolalpha;
    cout << isPalindrome("A man, a plan, a canal: Panama") << endl; // true
    cout << isPalindrome("race a car") << endl; // false
    return 0;
}

Bubble Sort Example: Lua vs C++

Bubble Sort in Lua

function bubbleSort(arr)
    local n = #arr
    for i = 1, n do
        for j = 1, n - i do
            if arr[j] > arr[j + 1] then
                arr[j], arr[j + 1] = arr[j + 1], arr[j]
            end
        end
    end
    return arr
end

local arr = {64, 34, 25, 12, 22, 11, 90}
local sorted = bubbleSort(arr)
print(table.concat(sorted, " "))

Bubble Sort in C++

#include <iostream>
#include <vector>
using namespace std;

void bubbleSort(vector<int>& arr) {
    int n = arr.size();
    for(int i = 0; i < n; i++) {
        for(int j = 0; j < n - i - 1; j++) {
            if(arr[j] > arr[j + 1]) {
                swap(arr[j], arr[j + 1]);
            }
        }
    }
}

int main() {
    vector<int> arr = {64, 34, 25, 12, 22, 11, 90};
    bubbleSort(arr);
    
    for(int num : arr) {
        cout << num << " ";
    }
    return 0;
}