TagUnset

f/:lhs=.

清除对 lhs 的任何定义,和符号 f 关联.

更多信息

  • 仅当它们的左边等于 lhs 并且在右边给出的 Condition 中的测试也相等时,去掉规则.

范例

打开所有单元关闭所有单元

基本范例  (1)

范围  (2)

清除立即定义:

清除延迟定义:

属性和关系  (1)

=. 清除具有特定左边的定义:

清除所有定义:

可能存在的问题  (1)

清除一个上值(upvalue),需要标签:

Wolfram Research (1988),TagUnset,Wolfram 语言函数,https://reference.wolfram.com/language/ref/TagUnset.html.

文本

Wolfram Research (1988),TagUnset,Wolfram 语言函数,https://reference.wolfram.com/language/ref/TagUnset.html.

CMS

Wolfram 语言. 1988. "TagUnset." Wolfram 语言与系统参考资料中心. Wolfram Research. https://reference.wolfram.com/language/ref/TagUnset.html.

APA

Wolfram 语言. (1988). TagUnset. Wolfram 语言与系统参考资料中心. 追溯自 https://reference.wolfram.com/language/ref/TagUnset.html 年

BibTeX

@misc{reference.wolfram_2024_tagunset, author="Wolfram Research", title="{TagUnset}", year="1988", howpublished="\url{https://reference.wolfram.com/language/ref/TagUnset.html}", note=[Accessed: 22-November-2024 ]}

BibLaTeX

@online{reference.wolfram_2024_tagunset, organization={Wolfram Research}, title={TagUnset}, year={1988}, url={https://reference.wolfram.com/language/ref/TagUnset.html}, note=[Accessed: 22-November-2024 ]}