Build an object from keys and values

Parsing a CSV gives you one array of column names and one array of cell values per row. Pairing them up by position is what turns two arrays into a usable record.

Implement zipObject(keys, values). Pair keys[i] with values[i] and return a plain object. Extra values beyond the end of keys are ignored. A key with no matching value — that is, an index at or past the end of values — is skipped entirely and must not appear in the result. If the same key appears twice in keys, the later value wins. Keys become object properties, so they are coerced to strings. Two empty arrays return an empty object.

zipObject(["name", "role"], ["Ada", "engineer"]);
// { name: "Ada", role: "engineer" }

zipObject(["a"], [1, 2, 3]);        // { a: 1 } — extras ignored
zipObject(["a", "b", "c"], [1]);    // { a: 1 } — b and c have no value
zipObject(["a", "a"], [1, 2]);      // { a: 2 } — the later value wins