我只想将文本附加到对象

Question

现在，对于每个包含字符串“shirt”的商品，我想将 shirt 替换为“Shirts are not available

const inventory = [
        { line_item_id: "55412", item: "Shirt small", description: "" },
        { line_item_id: "55342", item: "shirt big full", description: "" },
        { line_item_id: "1124",  item: "Pant Small",description: "",},
    ];

我希望它看起来像这样

const inventory = [
    { line_item_id: "55412", item: "Shirts are not available small", description: "" },
    { line_item_id: "55342", item: "Shirts are not available big full", description: "" },
    { line_item_id: "1124",  item: "Pant Small",description: "",},
];

我使用了地图功能，但它不包括未修改的行

我的代码

  const test = convertedToJson.map((convertedToJson) => {
        if (!!convertedToJson.item.match(/Shirt/i)) {
            return convertedToJson.item + "Shirts are not available  ";
        }
    });
    console.log(test);

“我的输出”

const inventory = [
       'Shirts are not available small'
        'Shirts are not available big full'
    ];

Answer 1

const convertedInventory = inventory.map((it) => {
  const reg = new RegExp(/Shirt/i);
  if (it.item.match(reg)) {
    return {
      ...it,
      item: it.item.replace(reg, 'Shirts are not available')
    }
  }
  return it;
})

Answer 2

您可以使用映射和替换

const inventory = [{
    line_item_id: "55412",
    item: "Shirt small",
    description: ""
  },
  {
    line_item_id: "55342",
    item: "shirt big full",
    description: ""
  },
  {
    line_item_id: "1124",
    item: "Pant Small",
    description: "",
  },
];

const newVal = inventory.map((elem) => {
  // checking if string contains shirt/Shirt
  if (elem.item.toLowerCase().indexOf('shirt') !== -1) {
    return {
      ...elem,
      // case-insensitive replacement
      item: elem.item.replace(/shirt/gi, "Shirts are not available")

    }
  } else {
    return { ...elem
    }
  }
});

console.log(newVal)

Answer 3

const test = convertedToJson.map((convertedToJson) => {
        if (convertedToJson.item.toLowerCase().indexOf('shirt') !== -1) {
            convertedToJson.item = convertedToJson.item.replace(/shirt/gi, "Shirts are not available");
        }
        return convertedToJson
    });
    console.log(test);

您的代码存在的问题是，只有在满足条件的情况下，您才 return 计算值。我只是 return 外面的值，如果 'if condition' 得到满足，该值将被操纵

Answer 4

这边...

const inventory = 
  [ { line_item_id: "55412", item: "Shirt small",    description: "" } 
  , { line_item_id: "55342", item: "shirt big full", description: "" } 
  , { line_item_id: "1124",  item: "Pant Small",     description: "" } 
  ] 

inventory.forEach((obj,i,arr)=>
  arr[i].item = obj.item.replace(/shirt/i, 'Shirts are not available'))

console.log( inventory )

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Answer 5

您可以使用 Array.prototype.map 轻松实现此目的。

const inventory = [{
    line_item_id: "55412",
    item: "Shirt small",
    description: ""
  },
  {
    line_item_id: "55342",
    item: "shirt big full",
    description: ""
  },
  {
    line_item_id: "1124",
    item: "Pant Small",
    description: ""
  },
];

const result = inventory.map((el) => {
  if (el.item.toLowerCase().includes("shirt")) {
    return { ...el,
      item: "Shirts are not available small"
    };
  }
  return el;
});


console.log( result );

我只想将文本附加到对象

I just want to append text to an object

javascript

arrays

json

node.js

map-function