Last Updated :2025/11/28

second-class object

Noun
Japanese Meaning
プログラミングにおいて、関数に引数として渡すことはできるが、関数の戻り値として返したり変数に代入したりすることができないエンティティ。
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一部の古いプログラミング言語では、関数の引数として渡すことはできても、関数から返したり変数に代入したりすることはできないエンティティは、第一級オブジェクトに比べて制限されたオブジェクトとして扱われます。

plural

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(programming, languages) An entity of which the value can be passed as a parameter, but that can neither be returned from a function, nor be assigned to a variable. (Used by Raphael Finkel, the first-class object does not need to have run-time constructability according to his definition.)

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second-class object

In some older programming languages, a second-class object can be passed as a parameter but cannot be returned from a function or assigned to a variable.

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In some older programming languages, a second-class object can be passed as a parameter but cannot be returned from a function or assigned to a variable.

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