Question

如何按文件的最后修改日期排序？下面的代码只是按扩展名（json或jpg）对它们进行排序

function ambilData(req, res) {
  let hasil;

  ember
  .getFiles(options)
  .then(results => {
    const files = results[0];
    const tempArr = [];
    let jsonArr = [],
        jpgArr = [];

    files.forEach(file => {
      let nama = file.name,
          mapped = nama.slice(9, nama.length);

      tempArr.push(mapped)
    });

    tempArr.shift();
    tempArr.forEach(file => {
      if (file.split('.')[1] == 'json') {
        jsonArr.push(file)
      } else {
        jpgArr.push(file)
      }
    })

    res.send(listToMatrix(jsonArr, jpgArr))
  })
  .catch(err => {
    console.error('ERROR:', err);
  });
}

我正在使用Node.JS，并将使用express将上面的代码编写到REST API中。

Answer 1

以下内容如何：

// Imports the Google Cloud client library
const {Storage} = require('@google-cloud/storage');

// Your Google Cloud Platform project ID
const projectId = 'YOUR PROJECT';

// Creates a client
const storage = new Storage({
  projectId: projectId,
});

// The name for the new bucket
const bucketName = 'YOUR-BUCKET';
const bucket = storage.bucket(bucketName);
bucket.getFiles(null, (err,data) => {
    data.sort((a, b) => {
        if (a.metadata.updated > b.metadata.updated) {
            return 1;
        }
        if (a.metadata.updated < b.metadata.updated) {
            return -1;
        }
        return 0;
    });
    for (file of data) {
        console.log(` ${file.metadata.name} - ${file.metadata.updated}`);
    }
});

Answer 2

检查响应中更新的元数据并使用

const data = [{file:"a",metadata:{updated:"2019-03-23T17:42:53.846"}},{file:"b",metadata:{updated:"2017-03-23T17:42:53.846"}},{file:"c",metadata:{updated:"2016-03-23T17:42:53.846"}}];
//sorts ascending
let sortAsc = data.sort((a,b) => new Date(a.metadata.updated) - new Date(b.metadata.updated));
//sorts descending
let sortDesc = data.sort((a,b) => new Date(b.metadata.updated) - new Date(a.metadata.updated));

Google云端存储按对象的最后修改日期对它们进行排序

2 个答案: