DateObjectQ[expr]
如果 expr 是具有有效参数的 DateObject,给出 True,否则给出 False.
DateObjectQ
DateObjectQ[expr]
如果 expr 是具有有效参数的 DateObject,给出 True,否则给出 False.
文本
Wolfram Research (2014),DateObjectQ,Wolfram 语言函数,https://reference.wolfram.com/language/ref/DateObjectQ.html.
CMS
Wolfram 语言. 2014. "DateObjectQ." Wolfram 语言与系统参考资料中心. Wolfram Research. https://reference.wolfram.com/language/ref/DateObjectQ.html.
APA
Wolfram 语言. (2014). DateObjectQ. Wolfram 语言与系统参考资料中心. 追溯自 https://reference.wolfram.com/language/ref/DateObjectQ.html 年
BibTeX
@misc{reference.wolfram_2025_dateobjectq, author="Wolfram Research", title="{DateObjectQ}", year="2014", howpublished="\url{https://reference.wolfram.com/language/ref/DateObjectQ.html}", note=[Accessed: 12-April-2026]}
BibLaTeX
@online{reference.wolfram_2025_dateobjectq, organization={Wolfram Research}, title={DateObjectQ}, year={2014}, url={https://reference.wolfram.com/language/ref/DateObjectQ.html}, note=[Accessed: 12-April-2026]}