Interface
A software interface is a contract or boundary that specifies the operations, properties, or capabilities through which types or components interact, without requiring a particular implementation.
Refactoring to Rust
An interface is a language construct or component boundary that specifies functionality implementing components must provide.
- How it is used
- Defines the boundary a host uses to call replaceable Wasm modules.
- How deep it goes
- Defines the contract through parameters and outputs, then shows a WasmEdge function call rather than general Rust interface syntax.
- Examples
- Uses a Rust CLI that registers a Wasm module and calls its `static_search` function.
- What you can do after
- Apply it via the WasmEdge SDK to call a Wasm module through a host-defined boundary.
Go in Action, Second Edition
An interface is a contract specifying operations or type-set membership that a type can provide without defining the type's implementation.
- How it is used
- Defines shared behavior for domain types and errors, and restricts permitted types in generic code.
- How deep it goes
- Works through implicit method satisfaction, concrete implementations, custom errors, and an exact-type constraint, without detailing interface runtime representation.
- Examples
- Uses Stringer formatting, recipe measurement conversion, a missing-keys error, and a Numeric linked list.
- What you can do after
- Build it from scratch: define a method contract, implement it on domain types, or specify exact permitted types for a generic list.
Julia as a Second Language
An interface is a defined set of operations and behavioral expectations through which software components interact independently of their implementations.
- How it is used
- Separates operations from implementations so functions and services can work with multiple arrays, collections, tanks, or ciphers.
- How deep it goes
- Explains Julia’s informal, documented method contracts through failures, defaults, and working implementations; does not introduce interface-declaration syntax.
- Examples
- Uses array–range summation, a propellant tank’s missing methods, interchangeable ciphers, and an iterable staged rocket.
- What you can do after
- Build it from scratch by documenting required methods, implementing them for concrete types, and reusing functions across implementations.
.NET in Action, Second Edition
An interface is a C# contract that specifies members an implementing type must provide.
- How it is used
- Uses interfaces as contracts for collection parameters and as abstractions that replace a card deck’s direct randomizer dependency.
- How deep it goes
- Defines implementation rules and contrasts abstract classes, then explains dependency inversion without listing a complete interface implementation.
- Examples
- Illustrates IEnumerable<string> in command-line parsing and an interface replacing System.Random in card shuffling.
- What you can do after
- Evaluate/understand when an interface lets an application choose among implementations instead of depending on one directly.
Read how .NET in Action, Second Edition explains interface →
Fabulous Adventures in Data Structures and Algorithms
An interface is a C# contract that specifies members a type can implement.
- How it is used
- Uses interfaces to define abstract data types before selecting immutable collection implementations.
- How deep it goes
- Develops operation sets and implementation consequences, stopping short of general interface theory beyond immutable stacks and deques.
- Examples
- Uses generic immutable stack and deque contracts with push, pop, peek, end-access, emptiness, and enumeration operations.
- What you can do after
- Build it from scratch by specifying C# collection contracts and implementing immutable stack or deque types behind them.
Read how Fabulous Adventures in Data Structures and Algorithms explains interface →
Essential TypeScript 5, Third Edition
An interface is a TypeScript type declaration that specifies the properties and methods a class must provide without implementing those members or defining a constructor.
- How it is used
- Defines contracts that classes implement while describing object shapes for shared annotations and collections.
- How deep it goes
- Explains declarations, implementation, extension, optional members, merging, and runtime guarding, but does not describe emitted interface code.
- Examples
- Uses Person, Employee, Customer, DogOwner, Product, arrays, optional dog details, and property-based narrowing.
- What you can do after
- Apply it to define class contracts, compose interfaces, handle optional members, and narrow interface-like unions safely.
Read how Essential TypeScript 5, Third Edition explains interface →
The Art of Code
An interface is a contract that specifies operations a component provides without prescribing their implementation.
- How it is used
- Separates a component’s high-level story from interchangeable low-level implementations.
- How deep it goes
- Demonstrates the contract, polymorphic implementation, and simplified client call, but does not explore interface language rules.
- Examples
- Uses PDF, CSV, and Excel report generators, contrasting conditional dispatch with ReportGenerator implementations.
- What you can do after
- Apply via polymorphism to separate report-format implementations from orchestration code.
Related concepts
- IDisposableincludes · IDisposable is a .NET interface whose Dispose method enables deterministic cleanup and release of unmanaged or otherwise disposable resources.
- io.Readerincludes · io.Reader is a Go standard-library interface whose Read method reads bytes into a supplied buffer and reports the number read and any error.
- implementationcontrasts with · An implementation is the concrete code, mechanisms, or artifacts that realize an abstract design, specification, algorithm, interface, or required behavior.
- polymorphismuses · Polymorphism is a programming-language capability that lets a common interface or operation work with values of different types while allowing behavior to vary by type or implementation.
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