Google Practice
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const array1 = ['a', 'b', 'c', 'd'];
const array2 = ['e', 'r', 's'];
function commons(arr1, arr2) {
let map = {};
for (let i=0; i < arr1.length; i++) {
if (!map[array1[i]]){
const item = array1[i];
map[item] = true;
}
}
for (let j=0; j < arr2.length; j++) {
if (map[array2[j]]) {
return true;
}
}
return false
};
commons(array1, array2)
JavaScript
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