减少到 Object 错误：无法创建属性

Question

I'm trying to create an object with a function inputs of an array and a callback.

It's not working as intended

 function arrToObj(array, callback) { return array.reduce((acc, currStr) => { return acc[currStr] = callback(currStr) }, {}) } const arrOfStrings = ['str1', 'str2']; const capitalize = str => str.toUpperCase(); console.log(arrToObj(arrOfStrings, capitalize)); // expecting: {str1: STR1, str2: STR2}

I'm getting an error: Type Error on line 4: Cannot create property 'str2' on string 'STR1'

I feel like there is something I've missed fundamentally with reduce. I appreciate any insights to further my knowledge.

Answer 1

The issue is in your reduce function. You are not returning the acc at the end.

 function arrToObj(array, callback) { return array.reduce((acc, currStr) => { acc[currStr] = callback(currStr); return acc; }, {}) } const arrOfStrings = ['str1', 'str2']; const capitalize = str => str.toUpperCase(); console.log(arrToObj(arrOfStrings, capitalize)); // expecting: {str1: STR1, str2: STR2}