javascript - JS 如何在 forEach 循环中从数组中删除一个对象？

Question

我有一个包含以下内容的 data 对象:

{
  "content": {
    "id": "someID",
    "type": "unit",
    "method": "xyz",
    "blocks": [{
      "key": "blue",
      "data": [
        "Array"
      ]
    }, {
      "key": "red",
      "data": [
        "Array"
      ]
    }, {
      "key": "yellow",
      "data": [
        "Array"
      ]
    }, {
      "key": "black",
      "data": [
        "Array"
      ]
    }],
    "notes": "abc"
  }
}

我想通过遍历 blocks 来删除具有键 yellow 的 block，其余数据应按原样保留。所以预期的最终结果是

{
  "content": {
    "id": "someID",
    "type": "unit",
    "method": "xyz",
    "blocks": [{
      "key": "blue",
      "data": [
        "Array"
      ]
    }, {
      "key": "red",
      "data": [
        "Array"
      ]
    }, {
      "key": "black",
      "data": [
        "Array"
      ]
    }],
    "notes": "abc"
  }
}

数据是动态的，所以我不知道会返回什么，它可能与我的条件匹配，也可能不匹配。

我尝试了很多方法，但到目前为止似乎没有任何效果。如果更容易的话，我也可以使用 lodash。这些似乎都不起作用。感谢任何帮助/指导

1. Using **delete**

const deleteUnwantedBlock = contentObj => {
  const updatedData = contentObj;
  const blocks = _.get(updatedData, 'blocks', []);

  blocks.forEach(block => {
    if (block.key.includes('yellow')) {
      delete updatedData.block;
    }
  });
  return updatedData;
};

console.log(deleteUnwantedBlock(data.content));```



2. Using rest operator:

    const deleteUnwantedBlock = contentObj => {
      const blocks = _.get(contentObj, 'blocks', []);
      blocks.forEach(block => {
        if (block.key.includes('yellow')) {
          let { block, ...restOfTheData } = updatedData;
        }
        return { ...updatedEntry };
      });
    };

    console.log(deleteUnwantedBlock(data.content));

Answer 1

你只需要过滤:

const obj = {
  "content": {
    "id": "someID",
    "type": "unit",
    "method": "xyz",
    "blocks": [{
      "key": "blue",
      "data": [
        "Array"
      ]
    }, {
      "key": "red",
      "data": [
        "Array"
      ]
    }, {
      "key": "yellow",
      "data": [
        "Array"
      ]
    }, {
      "key": "black",
      "data": [
        "Array"
      ]
    }],
    "notes": "abc"
  }
};
obj.content.blocks = obj.content.blocks.filter(({ key }) => key !== 'yellow');
console.log(obj);