function logMapElements(value, key, map) {
console.log(`m[${key}] = ${value}`);
}
new Map([
['foo', 3],
['bar', {}],
['baz', undefined],
]).forEach(logMapElements);
// Expected output: "m[foo] = 3"
// Expected output: "m[bar] = [object Object]"
// Expected output: "m[baz] = undefined"