Object.assign() 用于替换 json 的对象

Question

我JSON看起来像这样：{"ArrayInfo": [    {        "name": "A",        "Id": "1"    },    {        "name": "B",        "Id": "2"    },    {        "name": "C",        "Id": "3"    },    {        "name": "D",        "Id": "4"    }]}我想JSON用另一个对象替换一个对象。例如我有这个对象：{"name":"E","Id":"5"}它将被以下对象替换JSON：{"name":"B","Id":"2"}JSON 应如下所示：{"ArrayInfo": [    {        "name": "A",        "Id": "1"    },    {        "name": "E",        "Id": "5"    },    {        "name": "C",        "Id": "3"    },    {        "name": "D",        "Id": "4"    }]}我所做的是使用Object.assign但新对象将添加到数组而不是替换。（所有数据都将是动态的，但为了更易于理解，我使用静态数据）const itemToReplace = { "name": "E", "Id": "5" };const prevItem = ArrayInfo[2]ArrayInfo = ArrayInfo.map((el, idx) => {  return Object.assign({}, el, { prevItem: itemToReplace });});let NewArryInfo = ArrayInfoconsole.log(NewArryInfo)结果console.log(NewArryInfo)：{"ArrayInfo": [    {        "name": "A",        "Id": "1"    },    {        "name": "B",        "Id": "2"    },    {        "name": "C",        "Id": "3"    },    {        "name": "D",        "Id": "4"    }    {        "name": "E",        "Id": "5"    }]}

Answer 1

您可以使用Array.prototype.splice来替换 Array 中的项目。

const replaceItem = {"name":"E","Id":"5"}

const ArrayInfo = [

    {

        "name": "A",

        "Id": "1"

    },

    {

        "name": "B",

        "Id": "2"

    },

    {

        "name": "C",

        "Id": "3"

    },

    {

        "name": "D",

        "Id": "4"

    }

];

ArrayInfo.splice(1, 1, replaceItem); // remove second item and replace

console.log(ArrayInfo);

Answer 2

const object = {

  "ArrayInfo": [{

      "name": "A",

      "Id": "1"

    },

    {

      "name": "B",

      "Id": "2"

    },

    {

      "name": "C",

      "Id": "3"

    },

    {

      "name": "D",

      "Id": "4"

    }

  ]

};

const objectToReplace = {

  "name": "B",

  "Id": "2"

};

const updatedObject = Object.assign({}, object, {

  ArrayInfo: object.ArrayInfo.map((info) => {

    if (info.Id === objectToReplace.Id && info.name === objectToReplace.name) {

      return {

        "name": "E",

        "Id": "5"

      };

    }

    return info;

  })

});

console.log(updatedObject);

Answer 3

尝试这个！

let ArrayInfo = [{"name": "A","Id": "1"},{"name": "B","Id": "2"},{"name": "C","Id": "3"},{"name": "D","Id": "4"}];

const onReplace = {"name":"E","Id":"5"};

const toReplace = {"name": "B","Id": "2"};

function replaceArray(array, onReplace, toReplace) {

  const removeIndex = array.map(item => { return item.name; }).indexOf(toReplace.name);

  array.splice(removeIndex, removeIndex, onReplace);

  return array

}

console.log(replaceArray(ArrayInfo, onReplace, toReplace));