examples.org

Fact

Text

Cards of this note wil be created in {{c1::Default::which deck ?}}

Fact

Text

Cards of this note wil be created in {{c1::English::which deck ?}}

The English Language

Vocabulary

Item

Front

(it’s) raining cats and dogs

Back

it’s raining very hard

Grammar

Item

Front

说出名词从句的形式

Back

1. that + 一个完整的句子, that无实际意义
2. 由疑问句改装而成

Computing

Item

Front

How to trap errors in elisp ?

Back

(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))))

Math

Item1

Text

The dot product of two vectors is {{c1::$|α| ⋅ |β| cos{\varphi}$}}

Extra

Item2

Front

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 $α ⋅ β$ ?

Back

\[a_1b_1 + a_2b_2 + a_3b_3\]