对象属性为date的对象的筛选数组

const array = [
  { name: 'John', date: '2022-01-01' },
  { name: 'Jane', date: '2022-02-01' },
  { name: 'Bob', date: '2022-03-01' },
  { name: 'Alice', date: '2022-04-01' }
];

const filteredArray = array.filter(obj => obj.date instanceof Date);

console.log(filteredArray);

const mongoose = require('mongoose');

const Schema = mongoose.Schema;

const objectSchema = new Schema({
  name: String,
  date: Date
});

const ObjectModel = mongoose.model('Object', objectSchema);

ObjectModel.find({ date: { $type: 'date' } }, (err, objects) => {
  if (err) {
    console.error(err);
  } else {
    console.log(objects);
  }
});

import org.junit.Test;
import static org.junit.Assert.*;

public class ObjectFilterTest {
  
  @Test
  public void testFilterByDate() {
    Object[] array = {
      new Object("John", new Date()),
      new Object("Jane", "2022-02-01"),
      new Object("Bob", new Date()),
      new Object("Alice", "2022-04-01")
    };
    
    Object[] filteredArray = ObjectFilter.filterByDate(array);
    
    assertEquals(2, filteredArray.length);
    assertEquals("John", filteredArray[0].getName());
    assertEquals("Bob", filteredArray[1].getName());
  }
}

SELECT * FROM objects WHERE date IS NOT NULL;

#!/bin/bash

array=(
  "John,2022-01-01"
  "Jane,2022-02-01"
  "Bob,2022-03-01"
  "Alice,2022-04-01"
)

filteredArray=()

for item in "${array[@]}"; do
  if [[ $item == *,* ]]; then
    IFS=',' read -r -a parts <<< "$item"
    if [[ ${parts[1]} =~ ^[0-9]{4}-[0-9]{2}-[0-9]{2}$ ]]; then
      filteredArray+=("$item")
    fi
  fi
done

echo "${filteredArray[@]}"