#2794 - Create Object from Two Arrays

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Problem Description

Given two arrays keysArr and valuesArr, return a new object obj. Each key-value pair in obj should come from keysArr[i] and valuesArr[i].

If a duplicate key exists at a previous index, that key-value should be excluded. In other words, only the first key should be added to the object.

If the key is not a string, it should be converted into a string by calling String() on it.

Solution

/**
 * @param {Array} keysArr
 * @param {Array} valuesArr
 * @return {Object}
 */
var createObject = function(keysArr, valuesArr) {
  const result = {};

  for (let i = 0; i < keysArr.length; i++) {
    const stringKey = String(keysArr[i]);
    if (!(stringKey in result)) {
      result[stringKey] = valuesArr[i];
    }
  }

  return result;
};