请问react 怎么把数组转为对象

[qq_40067743]

react 数组 const arr1= [
{"id":"1","key_name":"a","key_value":"aaa"},
{"id":"2","key_name":"b","key_value":"bbb"},
{"id":"3","key_name":"c","key_value":"ccc"},
{"id":"3","key_name":"d","key_value":"ddd"},

];
要为转为 对象 obj ={"a":"aaa",
"b":"bbb",
"c":"ccc",
"d":"ddd"}

请问哪位高手知道要怎么转换？

[葉幺]

var obj = {} for(var i=0;i<arr1.length;i++){ obj[arr1[i].key_name] = arr1[i].key_value } console.log(obj)

[前端开发小能手]

let arr = arr1.map(item => { let obj = {}; obj[item.key_name] = item.key_value; return obj; })