如果該物件包含在javascript中的物件陣列中，如何檢查整個原始物件（不使用任何屬性）？

我想用物件陣列檢查整個原始物件。我不想使用任何屬性名稱進行比較。

 const items = [{ a: 1 },{ a: 2 },{ a: 3 }];
  const item1 = { a: 2 };
  

如果我想item1在items不使用任何屬性但使用
整個物件的情況下檢查陣列中 是否存在該怎么辦。
indexOf filter some甚至lopping在這種情況下不起作用。
在這方面需要幫助。如何檢查？
順便說一下，我的情況不同。我有一個很長的物件，它的唯一性取決于很多屬性，這就是為什么我不想使用屬性進行比較。

我有這樣的事情。

function bigArraySol() {
  const bigArray = [
    {
      product_id: "1",
      product_name: "Womens Achara",
      total_price: "8000",
      unique_product_id: "1",
      seller_id: "sell1",
      image: "https://i.imgur.com/6CsDtqD.jpg",
      quantity: 3,
      product_types: [
        {
          product_type_id: "1",
          product_type_name: "Achara Cloth",
          attributes: [
            {
              attribute_name: "Achara Length",
              attribute_value: "4"
            },
            {
              attribute_name: "Achara Cloth",
              attribute_value: "Terry Cotton"
            }
          ]
        },
        {
          product_type_id: "2",
          product_type_name: "Khadki ",
          attributes: [
            {
              attribute_name: "Khadki Cloth",
              attribute_value: "Ready Made"
            },
            {
              attribute_name: "khadki Color",
              attribute_value: "mix"
            }
          ]
        },
        {
          product_type_id: "3",
          product_type_name: "Blouse",
          attributes: [
            {
              attribute_name: "Blouse Size",
              attribute_value: "20"
            }
          ]
        }
      ]
    },
    {
      product_id: "1",
      product_name: "Womens Achara",
      total_price: "8000",
      unique_product_id: "1",
      seller_id: "sell1",
      image: "https://i.imgur.com/6CsDtqD.jpg",
      quantity: 3,
      product_types: [
        {
          product_type_id: "1",
          product_type_name: "Achara Cloth",
          attributes: [
            {
              attribute_name: "Achara Length",
              attribute_value: "4"
            },
            {
              attribute_name: "Achara Cloth",
              attribute_value: "Terry Cotton"
            }
          ]
        },
        {
          product_type_id: "2",
          product_type_name: "Khadki ",
          attributes: [
            {
              attribute_name: "Khadki Cloth",
              attribute_value: "Ready Made"
            },
            {
              attribute_name: "khadki Color",
              attribute_value: "mix"
            }
          ]
        },
        {
          product_type_id: "3",
          product_type_name: "Blouse",
          attributes: [
            {
              attribute_name: "Blouse Size",
              attribute_value: "25"
            }
          ]
        }
      ]
    },
    {
      product_id: "1",
      product_name: "Womens Achara",
      total_price: "8000",
      unique_product_id: "1",
      seller_id: "sell1",
      image: "https://i.imgur.com/6CsDtqD.jpg",
      quantity: 3,
      product_types: [
        {
          product_type_id: "1",
          product_type_name: "Achara Cloth",
          attributes: [
            {
              attribute_name: "Achara Length",
              attribute_value: "4"
            },
            {
              attribute_name: "Achara Cloth",
              attribute_value: "Terry Cotton"
            }
          ]
        },
        {
          product_type_id: "2",
          product_type_name: "Khadki ",
          attributes: [
            {
              attribute_name: "Khadki Cloth",
              attribute_value: "Ready Made"
            },
            {
              attribute_name: "khadki Color",
              attribute_value: "mix"
            }
          ]
        },
        {
          product_type_id: "3",
          product_type_name: "Blouse",
          attributes: [
            {
              attribute_name: "Blouse Size",
              attribute_value: "25"
            }
          ]
        }
      ]
    }
  ];

  const compairingObj = {
    product_id: "1",
    product_name: "Womens Achara",
    total_price: "8000",
    unique_product_id: "1",
    seller_id: "sell1",
    image: "https://i.imgur.com/6CsDtqD.jpg",
    quantity: 3,
    product_types: [
      {
        product_type_id: "1",
        product_type_name: "Achara Cloth",
        attributes: [
          {
            attribute_name: "Achara Length",
            attribute_value: "4"
          },
          {
            attribute_name: "Achara Cloth",
            attribute_value: "Terry Cotton"
          }
        ]
      },
      {
        product_type_id: "2",
        product_type_name: "Khadki ",
        attributes: [
          {
            attribute_name: "Khadki Cloth",
            attribute_value: "Ready Made"
          },
          {
            attribute_name: "khadki Color",
            attribute_value: "mix"
          }
        ]
      },
      {
        product_type_id: "3",
        product_type_name: "Blouse",
        attributes: [
          {
            attribute_name: "Blouse Size",
            attribute_value: "20"
          }
        ]
      }
    ]
  };
}

在沙箱中查看：https : //codesandbox.io/s/javascript-forked-q8yu6? file =/ index.js: 0-4933

uj5u.com熱心網友回復：

您可以簡單地 JSON 字串化它們并進行比較。

const items = [{ a: 1 },{ a: 2 },{ a: 3 }];
const item1 = { a: 2 };

items.map((item, index) => {
  if (JSON.stringify(item) === JSON.stringify(item1)) {
    console.log('item1 exists in index '   index);
  }
})

uj5u.com熱心網友回復：

此代碼使用回圈并查看屬性來實作“陣列中的物件 indexOf”。它非常簡單，并且將匹配物件的haystack每個屬性具有相同值的任何needle物件。它應該很容易修改，以檢查匹配不具有的屬性沒有針發現-但我不能確定你的需求。

const indexOf = (needle, haystack) => {
  let index = -1;
  haystack.every((o,i) => {
    let found = true;
    for (let [k,v] of Object.entries(needle)) {
      if (o[k] !== v) { found = false; break; } 
    }
    if (found) index=i;
    return !found; // false exits
  });
  return index;
}

const haystack = [{ a: 1 },{ a: 2 },{ a: 3 }];
const needle = { a: 2 };

console.log(indexOf(needle, haystack)); // returns 1

標籤：javascript 数组 目的

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