check if a vector contains an element js code example

Example 1: if vector contains value c++

#include <algorithm>

if(std::find(v.begin(), v.end(), x) != v.end()) {
    /* v contains x */
} else {
    /* v does not contain x */
}

Example 2: see if array contains array javascript

const found = arr1.some(r=> arr2.indexOf(r) >= 0)