Option type
description: typ polimorficzny @pl
label: Option型 @ja
subject: Category:Articles with example Ada code
subject: Category:Functional programming
label: Typ Optional @pl
subject: Category:Articles with example Swift code
subject: Category:Programming language comparisons
label: Tipo opcional @es
subject: Category:Articles with example Scala code
subject: Category:Articles with example Rust code
subject: Category:Articles with example C++ code
subject: Category:Data types
date: July 2022
subject: Category:Articles with example Haskell code
description: encapsulation of an optional value in programming or type theory
with: the definition
subject: Category:Articles with example OCaml code
subject: Category:Articles with example Java code
subject: Category:Type theory
with: example usage
label: 可选类型 @zh
description: 存在しない可能性のある値をカプセル化して表す多相型 @ja