如何将3个javascript对象与修改后的值合并

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-1

我有3个对象,如[

const arr = [
{name:'ABC', value:123},
{name:'ABC', value:456},
{name:'ABC',value:789},
{name:'DEF',value:9999},
name:'DEF', value:0000}
]

我想输出像

updatedArr = [
  {name:'ABC', value:123, value1:456, value2:789}
  {name:'DEF', value:9999, value1:0000}
]

关于此的任何类型的链接也将有所帮助 .

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3回答

  • 2
    const arr = [{
        name: 'ABC',
        value: 123
      },
      {
        name: 'ABC',
        value: 456
      },
      {
        name: 'ABC',
        value: 789
      },
      {
        name: 'DEF',
        value: 9999
      },
      {
        name: 'DEF',
        value: 0000
      }
    ]
    
    const res = Object.values(arr.reduce((acc, item) => {
      if (!acc[item.name]) {
        acc[item.name] = item;
      } else {
        acc[item.name]['value' + (Object.keys(acc[item.name]).length - 1)] = item.value;
      }
    
      return acc;
    }, {}));
    
    console.log(res)
    

  • 2

    您可以使用 reduce 方法创建对象,然后使用 Object.values 来获取值数组 .

    const arr = [{name:'ABC', value:123},{name:'ABC', value:456},{name:'ABC',value:789},{name:'DEF',value:9999},{name:'DEF', value:0000}]
    
    const res = arr.reduce((r, e) => {
      if(!r[e.name]) r[e.name] = {...e}
      else {
        let {name, ...rest} = r[e.name];
        r[e.name][`value${Object.keys(rest).length}`] = e.value
      }
      return r;
    }, {});
    
    console.log(Object.values(res))
    

  • -1

    使用对象分配:

    Object.assign(ob1,ob2);
    
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