Style of dynamic typing in object-oriented programming
Type systems
General concepts
Type safety
Strong vs. weak typing
Major categories
Static vs. dynamic
Manifest vs. inferred
Nominal vs. structural
Duck typing
Minor categories
Abstract
Dependent
Flow-sensitive
Gradual
Intersection
Latent
Refinement
Substructural
Unique
Session
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In computer programming, duck typing is an application of the duck test—"If it walks like a duck and it quacks like a duck, then it must be a duck"—to determine whether an object can be used for a particular purpose. With nominative typing, an object is of a given type if it is declared as such (or if a type's association with the object is inferred through mechanisms such as object inheritance). With duck typing, an object is of a given type if it has all methods and properties required by that type.[1][2] Duck typing may be viewed as a usage-based structural equivalence between a given object and the requirements of a type.
compiler does not check or enforce type constraint rules. The term ducktyping is now used to describe the dynamic typing paradigm used by the languages in...
systems, where comparisons are based on the names of the types or explicit declarations, and ducktyping, in which only the part of the structure accessed at...
not that." Call a spade a spade – Figurative expression Ducktyping – Style of dynamic typing in object-oriented programming Extensionality – Logic principle...
static typing) and some expressions may be left untyped and eventual type errors are reported at runtime (which is dynamic typing). Gradual typing allows...
This typically requires run-time type checking and so is commonly used synonymously with dynamic typing. Ducktyping Allen B. Tucker (28 June 2004). Computer...
parametric polymorphism, or ducktyping, then the verbose nature of intersection types is unfavorable. Therefore, intersection types should be considered complementary...
Dynamic typing typically allows ducktyping (which enables easier code reuse). Many[specify] languages with static typing also feature ducktyping or other...
store integers then its type must be declared as integer. The term "manifest typing" is often used with the term latent typing to describe the difference...
DuckDuckGo is an American software company that offers a number of products intended to help people protect their online privacy. The flagship product...
permitted. Nominal typing is useful at preventing accidental type equivalence, which allows better type-safety than structural typing. The cost is a reduced...
Duck is the common name for numerous species of waterfowl in the family Anatidae. Ducks are generally smaller and shorter-necked than swans and geese,...
called type reconstruction.: 320 If a term is well-typed in accordance with Hindley–Milner typing rules, then the rules generate a principal typing for...
term "ducktyping" to refer to a similar concept, but with a different emphasis. While late binding generally focuses on implementation details, duck typing...
In statically typed languages such as Java these multiple classes are subclasses of the same superclass. In languages with ducktyping, such as Ruby,...
"Vale's Vision". Retrieved 6 December 2023. Higher RAII, a form of linear typing that enables destructors with parameters and returns. "Go by Example: Defer"...
feature (although the use of ducktyping makes abstract types unnecessary); however traits are found in some modern dynamically-typed languages.[citation needed]...
TwoTypes; D1, D2: DualTypes; Under strict typing, a variable defined as TwoTypes is not compatible with DualTypes (because they are not identical, even though...
a predefined set of types, enforcing proper usage usually requires some context. Another example is ducktyping, where the type of an element can change...
expression. ECMAScript supports various ways to test the type of objects, including ducktyping. Since ES 2015, transpiling JavaScript has become very common...
and gastronomy, duck or duckling is the meat of several species of bird in the family Anatidae, found in both fresh and salt water. Duck is eaten in many...
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