如何识别编码在字符串中的日期或日期和时间？

import re
from datetime import datetime

def parse_date(date_str):
    patterns = [
        r'\d{4}-\d{2}-\d{2}',  # YYYY-MM-DD
        r'\d{2}/\d{2}/\d{4}',  # MM/DD/YYYY
        r'\d{2}-\d{2}-\d{4}',  # DD-MM-YYYY
        r'\d{4}-\d{2}-\d{2} \d{2}:\d{2}:\d{2}'  # YYYY-MM-DD HH:MM:SS
    ]
    
    for pattern in patterns:
        match = re.match(pattern, date_str)
        if match:
            try:
                return datetime.strptime(date_str, pattern.replace(r'\d', '%'))
            except ValueError:
                continue
    return None

# 示例
print(parse_date("2023-10-05"))  # 输出: 2023-10-05 00:00:00
print(parse_date("10/05/2023"))  # 输出: 2023-10-05 00:00:00
print(parse_date("05-10-2023"))  # 输出: 2023-10-05 00:00:00
print(parse_date("2023-10-05 14:30:00"))  # 输出: 2023-10-05 14:30:00

function parseDate(dateStr) {
    const patterns = [
        /^\d{4}-\d{2}-\d{2}$/,  // YYYY-MM-DD
        /^\d{2}\/\d{2}\/\d{4}$/,  // MM/DD/YYYY
        /^\d{2}-\d{2}-\d{4}$/,  // DD-MM-YYYY
        /^\d{4}-\d{2}-\d{2} \d{2}:\d{2}:\d{2}$/  // YYYY-MM-DD HH:MM:SS
    ];

    for (let pattern of patterns) {
        if (pattern.test(dateStr)) {
            return new Date(dateStr);
        }
    }
    return null;
}

// 示例
console.log(parseDate("2023-10-05"));  // 输出: Thu Oct 05 2023 00:00:00 GMT+0800 (China Standard Time)
console.log(parseDate("10/05/2023"));  // 输出: Thu Oct 05 2023 00:00:00 GMT+0800 (China Standard Time)
console.log(parseDate("05-10-2023"));  // 输出: Thu Oct 05 2023 00:00:00 GMT+0800 (China Standard Time)
console.log(parseDate("2023-10-05 14:30:00"));  // 输出: Thu Oct 05 2023 14:30:00 GMT+0800 (China Standard Time)