Enhance Your Understanding with Objective-C Concept Cards for quick learning
A general-purpose, object-oriented programming language used primarily for developing software for Apple's macOS and iOS operating systems.
The classification of data items that determine the possible values and operations on them. Objective-C supports various data types such as integers, floating-point numbers, characters, and more.
Named storage locations used to store values during the execution of a program. In Objective-C, variables must be declared with their data type before they can be used.
Symbols or keywords that perform operations on operands. Objective-C supports various operators such as arithmetic, relational, logical, and assignment operators.
The order in which statements are executed in a program. Objective-C provides control flow statements like if-else, switch, for, while, and do-while to control the flow of execution.
A block of code that performs a specific task. In Objective-C, functions are used to modularize code and improve code reusability.
Blueprints for creating objects that define their properties and behaviors. Objective-C follows a class-based object-oriented programming paradigm.
Instances of classes that encapsulate data and behavior. Objective-C uses objects to represent real-world entities and interact with them.
A mechanism that allows a class to inherit properties and behaviors from another class. Objective-C supports single inheritance, where a class can inherit from only one superclass.
The ability of an object to take on many forms. Objective-C supports polymorphism through method overriding and dynamic binding.
The process of allocating and deallocating memory for objects. Objective-C uses reference counting to manage memory, where objects are retained and released as needed.
The process of reading from and writing to files. Objective-C provides file handling mechanisms to perform operations on files, such as opening, closing, reading, and writing.
The process of dealing with errors that occur during program execution. Objective-C provides error handling mechanisms like exceptions and error codes to handle and recover from errors.
Methods and tools used to identify and fix errors in a program. Objective-C provides debugging features like breakpoints, stepping through code, and inspecting variables.
Recommended guidelines and techniques for writing clean, efficient, and maintainable Objective-C code. Following best practices can improve code quality and readability.
Attributes of an object that define its state. Objective-C provides properties to encapsulate data and provide controlled access to object attributes.
Functions associated with a class or object that define their behavior. Objective-C uses methods to perform actions and manipulate object data.
A way to add methods to an existing class without modifying its source code. Objective-C allows extending classes using categories to enhance functionality.
A set of methods that a class can adopt to define a specific behavior. Objective-C uses protocols to achieve polymorphism and define contracts between objects.
A language feature that allows creating and using anonymous functions. Objective-C supports blocks to encapsulate code and pass it as arguments to functions or methods.
A way to define a set of named values. Objective-C provides enumerations to create custom data types with a fixed set of possible values.
A mechanism for communication between objects without direct coupling. Objective-C uses notifications to broadcast messages and allow objects to observe and respond to events.
A mechanism for accessing object properties using string-based keys. Objective-C provides key-value coding to simplify object property manipulation.
A mechanism for observing changes to object properties. Objective-C allows objects to register as observers and receive notifications when properties change.
Automatic Reference Counting (ARC) is a memory management technique used in Objective-C to automatically manage object memory without manual memory management.
A design pattern that restricts the instantiation of a class to a single object. Objective-C allows implementing the singleton pattern to ensure a class has only one instance.
A design pattern that allows one object to delegate tasks to another object. Objective-C supports the delegation pattern to achieve loose coupling and modular design.
A design pattern that connects user interface elements to actions in code. Objective-C uses the target-action pattern to handle user interactions and trigger appropriate actions.
A situation where allocated memory is not deallocated, leading to memory consumption over time. Objective-C developers need to be aware of memory leaks and use proper memory management techniques.
A situation where objects hold strong references to each other, preventing them from being deallocated. Objective-C developers need to avoid retain cycles to prevent memory leaks.
A technique that allows changing the implementation of a method at runtime. Objective-C supports method swizzling to modify the behavior of existing methods.
Categories and extensions are both used to add methods to existing classes, but extensions can also add properties and instance variables. Objective-C developers need to understand the differences and use the appropriate approach.
A feature that allows a subclass to provide a different implementation of a method defined in its superclass. Objective-C supports method overriding to customize behavior in subclasses.
A feature that allows multiple methods with the same name but different parameters. Objective-C does not support method overloading directly, but it can be achieved using different method names.
A mechanism that determines the method to be called at runtime based on the actual object type. Objective-C uses dynamic binding to achieve polymorphism and late binding.
A mechanism that determines the method to be called at compile-time based on the declared type. Objective-C uses static binding for methods that are not overridden.
A mechanism for handling exceptional conditions that occur during program execution. Objective-C provides exception handling to catch and recover from runtime errors.
Instructions to the compiler that are processed before the actual compilation. Objective-C uses preprocessor directives to control compilation and include or exclude code based on conditions.
Information added to the compiled code to aid in debugging. Objective-C uses debugging symbols to map machine code back to the original source code for easier debugging.
A technique that allows including or excluding code based on compile-time conditions. Objective-C uses conditional compilation to create different versions of a program for different platforms or configurations.
The process of adding comments and annotations to code to explain its purpose and usage. Objective-C developers should document their code to improve readability and maintainability.
The process of restructuring existing code to improve its design, readability, and maintainability. Objective-C developers should regularly refactor their code to eliminate code smells and improve efficiency.
The process of improving code performance and efficiency. Objective-C developers should optimize their code to reduce execution time, memory usage, and other resources.
The process of managing different versions of code to track changes and facilitate collaboration. Objective-C developers should use version control systems to manage their codebase.
The process of examining code to identify bugs, improve quality, and ensure adherence to coding standards. Objective-C developers should participate in code reviews to enhance code quality.
The process of verifying that code functions as expected. Objective-C developers should write unit tests and perform integration testing to ensure code correctness and reliability.
The process of analyzing code performance and identifying bottlenecks. Objective-C developers should use code profiling tools to optimize their code and improve efficiency.
The process of protecting code from unauthorized access, modification, or exploitation. Objective-C developers should follow secure coding practices to prevent security vulnerabilities.
The process of making code difficult to understand or reverse-engineer. Objective-C developers can use code obfuscation techniques to protect their intellectual property.
The process of automatically generating documentation from code comments and annotations. Objective-C developers can use documentation generation tools to create API documentation.
Software tools used to analyze code performance and identify bottlenecks. Objective-C developers can use profiling tools like Instruments to optimize their code.
Frameworks and libraries used to write and execute tests for Objective-C code. Objective-C developers can use testing frameworks like XCTest or OCMock to automate testing.
Software tools used to manage different versions of code and facilitate collaboration. Objective-C developers can use version control systems like Git or SVN to track changes.