KeyFreeQ

KeyFreeQ[assoc,form]

連想 assoc 中のどのキーも form にマッチしない場合はTrueを，それ以外の場合はFalse を与える．

KeyFreeQ[form]

式に適用可能なKeyFreeQの演算子形を表す．

例題

例  (4)

"foo"が連想中のキーかどうかの検定を行う：

連想に文字列のキーが含まれているかどうかの検定を行う：

KeyFreeQは規則のリストに使うことができる：

どの連想がキーを含まないかを判断する：

Wolfram Research (2015), KeyFreeQ, Wolfram言語関数， https://reference.wolfram.com/language/ref/KeyFreeQ.html.

テキスト

Wolfram Research (2015), KeyFreeQ, Wolfram言語関数， https://reference.wolfram.com/language/ref/KeyFreeQ.html.

CMS

Wolfram Language. 2015. "KeyFreeQ." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/KeyFreeQ.html.

APA

Wolfram Language. (2015). KeyFreeQ. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/KeyFreeQ.html

BibTeX

@misc{reference.wolfram_2024_keyfreeq, author="Wolfram Research", title="{KeyFreeQ}", year="2015", howpublished="\url{https://reference.wolfram.com/language/ref/KeyFreeQ.html}", note=[Accessed: 22-November-2024 ]}

BibLaTeX

@online{reference.wolfram_2024_keyfreeq, organization={Wolfram Research}, title={KeyFreeQ}, year={2015}, url={https://reference.wolfram.com/language/ref/KeyFreeQ.html}, note=[Accessed: 22-November-2024 ]}