In object-oriented programming: Are attributes and states really equivalent?
Apr 19, 2025 pm 04:18 PMObject-oriented programming: a detailed interpretation of properties and states
In object-oriented programming, properties and states are often confused, and the two are closely related but different. This article will deeply explore the role and differences between attributes and states in objects, and answer the core question of "whether attributes and states are equal."
In the article, Teacher
object is used as an example and status
attribute is used to represent its status (teaching, eating, sleeping). The value of status
will change according to the call of methods such as teach
, eat
, sleep
, etc., which seems to indicate that the status can be represented by attributes.
However, not all properties represent the state of the object. It depends on our understanding of "state". status
attribute reflects the dynamic behavior of Teacher
object and is a typical manifestation of state. But if other attributes are considered, such as the teacher's date of birth or the radius of the circle, these attribute values ??are usually unchanged throughout the life of the object. These static properties are not the state of the object, but the descriptive information of the object.
Therefore, attributes are means to describe the characteristics of an object, and states are the dynamic representation of an object at a specific moment. Attributes can be used to represent states, but not all attributes represent states. The attributes can be static descriptive or dynamic, and are used to reflect the state of the object. The key is whether the attribute value changes due to object behavior or time. If the property value changes, it is likely to represent the state of the object; otherwise, it may be just an inherent property of the object.
The above is the detailed content of In object-oriented programming: Are attributes and states really equivalent?. For more information, please follow other related articles on the PHP Chinese website!

Hot AI Tools

Undress AI Tool
Undress images for free

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Hot Topics

This heralds the first time an innovative protocol behind a new Stablecoin backed by Ethereum (ETH) and Bitcoin (BTC) is being held. Kucoin, the world's leading cryptocurrency trading platform, announced the launch of Resolv (Resolv) trading pairs in its spot market. This cooperation marks an important node in the development of the Resolv protocol, aiming to build a stablecoin ecosystem that requires no trust and has efficient capital utilization. From 13:00 UTC on May 18, Kucoin users can trade Resolv tokens through USDT trading pairs. Before the transaction is officially opened, the platform will hold an hour of gathering competition between 12:00 and 13:00UTC.

To find the correct login portal for Binance web version, you must enter https://www.binance.com directly in your browser; do not click on unknown links; add the official website to bookmark; confirm that the search engine displays the binance.com domain name; if you encounter regional restrictions, you can contact customer service.

In 2025, Ouyi OKX and Binance are both world-leading virtual currency trading platforms, each with its own characteristics and suitable for different types of users. 1. From the perspective of development history, OKX has grown into a comprehensive platform that provides multiple services such as spot, contracts, options, etc., while Binance is the exchange with the largest number of users and trading volumes, and has built a complete ecosystem around BNB; 2. In terms of technology and security, OKX uses technologies such as separation of hot and cold wallets and multiple signatures to ensure asset security, while Binance has set up a SAFU fund and has established a multi-level security protection system.

Your phone is no longer just for entertainment, it could be your new revenue stream. With the help of AI, your mobile device can be a powerful tool for mining. Your phone is no longer just for entertainment, which could be your new revenue stream. In an era where AI changes all walks of life and technology, it has seamlessly integrated into our lives and brings opportunities to create wealth in entirely new ways. One of the ways to attract much attention in 2025 is cloud mining, which allows users to mine cryptocurrencies without any hardware or manual operations. Today, this advanced technology has also been launched on mobile platforms, allowing people to obtain passive income directly through their mobile phones. Fiobit is one of the most popular cloud mining platforms in 2025, which combines AI automation and cloud computing technology. What is

In PHPMyAdmin, use CALL statements to execute stored procedures, and use SELECT statements to execute functions. 1. Execute stored procedures: CALLsp_example(); or CALLsp_example_with_param('parameter value');. 2. Execute function: SELECTfn_example('parameter value');. Pay attention to permission management, data type matching and performance optimization.

?The cryptocurrency trading platform is the core place for digital asset trading. For users who are new to the crypto field, choosing a suitable trading platform is crucial, which is related to trading experience, asset security and learning costs. There are many cryptocurrency exchanges around the world, including Binance and Gate.io. They each have a large user base and unique service characteristics. Understanding their basic situation and key differences will help beginners make smarter choices to better embark on their digital asset investment journey.

Binance and Huobi HTX are the world's leading cryptocurrency exchanges, each with their own advantages. 1. Binance was established in 2017, with large transaction volume and strong liquidity, providing rich financial derivatives and comprehensive ecosystem services; 2. Huobi HTX was established in 2013, with a long history and a deep user base in the Asian market, especially in the Chinese community; 3. In terms of handling fees, both adopt a stepped rate structure, and ordinary users can enjoy discounts by holding platform coins.

Binance and OKX are the world's top cryptocurrency trading platforms, each with its own characteristics. 1. Binance is known for its diverse product lines, covering a variety of transaction types such as spot, contracts, options, etc., and provides value-added services such as pledge and wealth management products; 2. Its technical structure is strong, with a high-performance trading engine and security protection system to ensure stable and smooth transactions; 3. Binance implements a global layout and builds a complete encryption ecosystem with BNB Chain as the core, supporting applications such as DeFi and NFT.
