01_find_example.js

const vect = [1, 2, 3, 4, 5, 6, 7, 8];

const numberSix = vect.find(number => number == 6);

console.log(numberSix); //6

02_find_example.cpp

#include <iostream>
#include <vector>
#include <algorithm>
#include <functional>

int main(){
    std::vector<int> vect { 1, 2, 3, 4, 5, 6, 7, 8, 9 };

    int numberSix = std::find_if_not(vect.begin(), vect.end(), [](int number) {return !(number == 6);})[0];

    std::cout << numberSix << std::endl; //6
}