json数组用js拆分

Question

有个json数组：

const products=[
    {"name": "groupA_01","url": "https://example.com/JXIS14AHZ9MX3"},
    {"name": "groupB_01","url": "https://example.com/JXISM5MAE9IXY"},
    {"name": "groupC_01","url": "https://example.com/JXISO1ZS24JIT"},
    {"name": "groupD_01","url": "https://example.com/JXISO3DMUPLSW"},
    {"name": "groupA_02","url": "https://example.com/JXISO7VRRZR56"},
    {"name": "groupB_02","url": "https://example.com/JXISOAB64OBOE"},
    {"name": "groupC_02","url": "https://example.com/JXISORRSSQGPS"},
    {"name": "groupD_02","url": "https://example.com/JXISOWOCC3IZP"},
    {"name": "groupA_03","url": "https://example.com/JXISPBQSYV1MQ"},
    {"name": "groupB_03","url": "https://example.com/JXISPQ5DJ4HKR"},
    {"name": "groupC_03","url": "https://example.com/JXISQ9FR1YKPF"},
    {"name": "groupD_03","url": "https://example.com/JXISQ85PZAY9S"},
    {"name": "groupA_04","url": "https://example.com/JXISQEO18ECPB"},
    {"name": "groupB_04","url": "https://example.com/JXISQJNJ0CRCH"},
    {"name": "groupC_04","url": "https://example.com/JXISQZOOS7JE9"},
    {"name": "groupD_04","url": "https://example.com/JXISRE6MYUYM9"}
];

我想把它拆分，保存为groupA、groupB、groupC、groupD四个新的json数组，像这样：

const productsGroupA = [
    {"name": "groupA_01","url": "https://example.com/JXIS14AHZ9MX3"},
    {"name": "groupA_02","url": "https://example.com/JXISO7VRRZR56"},
    {"name": "groupA_03","url": "https://example.com/JXISPBQSYV1MQ"},
    {"name": "groupA_04","url": "https://example.com/JXISQEO18ECPB"}    
];
//其他几个同样。

实际中group有很多，不止ABCD四个，所以不能用groupA、groupB、groupC、groupD作为关键字进行硬编码查询。但是这个规律是存在的，就是name字段=组名+下划线+编号。

问题：

用js实现，应该怎么做呢？

Answer 1

const products = [
        { name: 'groupA_01', url: 'https://example.com/JXIS14AHZ9MX3' },
        { name: 'groupB_01', url: 'https://example.com/JXISM5MAE9IXY' },
        { name: 'groupC_01', url: 'https://example.com/JXISO1ZS24JIT' },
        { name: 'groupD_01', url: 'https://example.com/JXISO3DMUPLSW' },
        { name: 'groupA_02', url: 'https://example.com/JXISO7VRRZR56' },
        { name: 'groupB_02', url: 'https://example.com/JXISOAB64OBOE' },
        { name: 'groupC_02', url: 'https://example.com/JXISORRSSQGPS' },
        { name: 'groupD_02', url: 'https://example.com/JXISOWOCC3IZP' },
        { name: 'groupA_03', url: 'https://example.com/JXISPBQSYV1MQ' },
        { name: 'groupB_03', url: 'https://example.com/JXISPQ5DJ4HKR' },
        { name: 'groupC_03', url: 'https://example.com/JXISQ9FR1YKPF' },
        { name: 'groupD_03', url: 'https://example.com/JXISQ85PZAY9S' },
        { name: 'groupA_04', url: 'https://example.com/JXISQEO18ECPB' },
        { name: 'groupB_04', url: 'https://example.com/JXISQJNJ0CRCH' },
        { name: 'groupC_04', url: 'https://example.com/JXISQZOOS7JE9' },
        { name: 'groupD_04', url: 'https://example.com/JXISRE6MYUYM9' }
      ]
      let obj = {}
      products.forEach(ele => {
        let key = ele.name.split('_')[0]
        if(!obj[key]){
          obj[key] =  []
        }
        obj[key].push(ele)
      });