JavaScript 对象数组，如何筛选出有相同key的对象

现有数组

let bList = [
            {
                cft: 'a',
                idName: 'test1',
                id: '01'
            }, {
                cft: 'a',
                idName: 'test2',
                id: '02'
            }, {
                cft: 'b',
                idName: '拜拜1',
                id: '21'
            }, {
                cft: 'b',
                idName: '拜拜2',
                id: '22'
            }, {
                cft: 'c',
                idName: '忽悠1',
                id: '31'
            }, {
                cft: 'c',
                idName: '忽悠2',
                id: '32'
            }
        ]

 const chatList= (a) => {
            // debugger;
            let result = Object.values(a.reduce((m, n) => {
                if (!m[n.cft]) {
                    m[n.cft] = { cft: n.cft, list: [] }
                }
                m[n.cft].list.push(n)
                return m
            }, {}))
            return result.map(item => item.list)
        }
 chatList(bList)

结果

 let newA = [
        [
            {
                cft: 'a',
                idName: 'test1',
                id: '01'
            }, {
                cft: 'a',
                idName: 'test2',
                id: '02'
            }
        ], [
            {
                cft: 'b',
                idName: '拜拜1',
                id: '21'
            }, {
                cft: 'b',
                idName: '拜拜2',
                id: '22'
            }
        ], [
            {
                cft: 'c',
                idName: '忽悠1',
                id: '31'
            }, {
                cft: 'c',
                idName: '忽悠2',
                id: '32'
            }
        ]
    ]