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js数组排序处理?

let arr = [ {price: 5, userUid: 0, item_name: '测试3'}, {price: 20, userUid: 0, item_name: '测试2'}, {price: 23, userUid: 0, item_name: '测试1'}, {price: 39, userUid: 0, item_name: '测试2'}, {price: 43, userUid: 0, item_name: '测试1'}, {price: 55, userUid: 0, item_name: '测试3'}, {price: 66, userUid: 0, item_name: '测试2'}, {price: 72, userUid: 0, item_name: '测试3'}, {price: 82, userUid: 0, item_name: '测试3'}, {price: 97, userUid: 0, item_name: '测试3'}, ] let items = [ { id: 1, num: 2 } { id: 2, num: 3 } { id: 3, num: 5 } ] 根据items数组里面num的值去arr数组里面拿数据，按竖向排序 期望得到数据格式： https://wmprod.oss-cn-shanghai.aliyuncs.com/c/user/20240916/0f9e8b987dd17c2c29f7029453893252.png let result= [ [{price: 5, userUid: 0, item_name: '测试3'},{price: 39, userUid: 0, item_name: '测试2'},] [{price: 20, userUid: 0, item_name: '测试2'},{price: 43, userUid: 0, item_name: '测试1'},{price: 66, userUid: 0, item_name: '测试2'},] [{price: 23, userUid: 0, item_name: '测试1'},{price: 55, userUid: 0, item_name: '测试3'},{price: 72, userUid: 0, item_name: '测试3'},{price: 82, userUid: 0, item_name: '测试3'},{price: 97, userUid: 0, item_name: '测试3'},] ] 麻烦各位大佬看看，感激不尽

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JavaScript 箭头函数在数组排序中的应用？

JavaScript箭头函数 let x = [1,2,3,4,5,6,7,8]; x.sort( (a,b) = > b-a ); console.log(x); 实现逆序的原理是什么？ 求大佬解惑