一个简单通用的数据分组方法

使用示例

const people = [
    { name: 'Alice', age: 26, sex: 'female'},
    { name: 'Bob', age: 19, sex: 'male'},
    { name: 'Charlie', age: 28, sex: 'male'},
    { name: 'Delly', age: 22, sex: 'female'},
    { name: 'Eva', age: 19, sex: 'female'},
    { name: 'Frank', age: 22, sex: 'male'},
    { name: 'David', age: 26, sex: 'male'}
]

const arr = [3, 4, 5, 31, 6, 232, 2, 11, 52]

const groups = customGrouping(people, 'sex');
const groups_2 = customGrouping(arr, item => item % 2 === 0 ? '偶数' : '奇数')