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Accepted
Aslero
Asked:2022-01-19 14:09:45 +0000 UTC2022-01-19 14:09:45 +0000 UTC

如何找到数组中的第一个元素，如果它为空，则插入或删除？

  • 772

加载时如何检查，如果product.thumbs数组（找到的第一个）有空元素，image === '' 则往里面插入数据，如果数组中没有空值，则只需推入数组

数组本身

product: {
        thumbs: [
          {
            image: '',
            thumb: '',
          },
          {
            image: '',
            thumb: '',
          },
          {
            image: '',
            thumb: '',
          },
          {
            image: '',
            thumb: '',
          },
        ],
}

和下载功能

uploadGallery() {
      const that = this
      const galleries = event.target.files
      galleries.forEach(function (value, index, product) {
        const formData = new FormData()
        formData.append('image', value)
        formData.append('path', 'products')
        that.$axios
          .$post('/api/v1/shop/1/upload/image', formData, {
            headers: { 'Content-Type': 'multipart/form-data' },
          })
          .then((response) => {
            if (!that.product.image) {
              that.product.image = response.path + response.image
            }
            
            that.product.thumbs.push({
              image: response.image,
              path: response.path,
            })
          })
          .catch((error) => {
          })
        return index < that.countThumb + 1
      })
    },
javascript

2 个回答

  1. Best Answer

    像这样的东西

    let product = {
        thumbs: [
          {
            image: '',
            thumb: '',
          },
          {
            image: '',
            thumb: '',
          },
          {
            image: '',
            thumb: '',
          },
          {
            image: '',
            thumb: '',
          }
        ]
}

if (product.thumbs.find(item => item.image === "") != null) {
  product.thumbs.find(item => item.image === "").image = "response.path " + "response.image"
}

product.thumbs.push({
  image: "response.image",
  path: "response.path"
})

console.log(product)

    • 1

  2. 它可以通过一个函数来完成。因此，您不仅可以获得图像，还可以获得任何指定的密钥。

    let product = {
        thumbs: [
          {
            image: 'Не пустой  image',
            thumb: '2',
          },
          {
            image: 'Не пустой  image',
            thumb: '4',
          },
          {
            image: 'Не пустой  image',
            thumb: '',
          },
          {
            image: '',
            thumb: '',
          }
        ] 
} 

function findEmptyValue(arr, key) {  
   return arr.map(el => el[key].length === 0 ? 'image' : el);
} 
console.log(findEmptyValue(product.thumbs, 'image'));
    • 0

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