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2794. Create Object from Two Arrays
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.
Example 1:
Input: keysArr = ["a", "b", "c"], valuesArr = [1, 2, 3] Output: {"a": 1, "b": 2, "c": 3} Explanation: The keys "a", "b", and "c" are paired with the values 1, 2, and 3 respectively. Example 2:
Input: keysArr = ["1", 1, false], valuesArr = [4, 5, 6] Output: {"1": 4, "false": 6} Explanation: First, all the elements in keysArr are converted into strings. We can see there are two occurrences of "1". The value associated with the first occurrence of "1" is used: 4. Example 3:
Input: keysArr = [], valuesArr = [] Output: {} Explanation: There are no keys so an empty object is returned.
Constraints:
keysArrandvaluesArrare valid JSON arrays2 <= JSON.stringify(keysArr).length, JSON.stringify(valuesArr).length <= 5 * 105keysArr.length === valuesArr.length
Solutions
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function createObject(keysArr: any[], valuesArr: any[]): Record<string, any> { const ans: Record<string, any> = {}; for (let i = 0; i < keysArr.length; ++i) { const k = String(keysArr[i]); if (ans[k] === undefined) { ans[k] = valuesArr[i]; } } return ans; } -
/** * @param {Array} keysArr * @param {Array} valuesArr * @return {Object} */ var createObject = function (keysArr, valuesArr) { const ans = {}; for (let i = 0; i < keysArr.length; ++i) { const k = keysArr[i] + ''; if (ans[k] === undefined) { ans[k] = valuesArr[i]; } } return ans; };