Cards of this note wil be created in {{c1::Default::which deck ?}}
Cards of this note wil be created in {{c1::English::which deck ?}}
(it’s) raining cats and dogs
it’s raining very hard
说出名词从句的形式
- that + 一个完整的句子, that无实际意义
- 由疑问句改装而成
How to trap errors in elisp ?
(condition-case the-error
;; the protected form
(progn
(do-something-dangerous)
(do-something-more-dangerous))
;; handlers
(error-symbol1 (handler1 the-error))
((error-symbol2 error-symbol3 (handler the-error))))The dot product of two vectors is {{c1::$|α| ⋅ |β| cos{\varphi}$}}
Given two vectors:
\begin{equation*} α = \{a_1, a_2, a_3\}, β = \{b_1, b_2, b_3\} \end{equation*}
What’s the result of
\[a_1b_1 + a_2b_2 + a_3b_3\]