83 lines
1.7 KiB
Org Mode
83 lines
1.7 KiB
Org Mode
* English :deck:
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** Vocabulary
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*** Item :note:
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:PROPERTIES:
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:ANKI_NOTE_TYPE: Basic (and reversed card)
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:ANKI_TAGS: vocab idioms
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:END:
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**** Front
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(it's) raining cats and dogs
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**** Back
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it's raining very hard
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* Computing :deck:
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** Item :note:
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:PROPERTIES:
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:ANKI_NOTE_TYPE: Basic
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:ANKI_TAGS: lisp emacs programming
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:END:
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*** Front
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How to trap errors in elisp ?
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*** Back
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#+BEGIN_EXPORT html
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<div align="left">
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#+END_EXPORT
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#+BEGIN_SRC emacs-lisp
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(condition-case the-error
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;; the protected form
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(progn
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(do-something-dangerous)
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(do-something-more-dangerous))
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;; handlers
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(error-symbol1 (handler1 the-error))
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((error-symbol2 error-symbol3 (handler the-error))))
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#+END_SRC
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#+BEGIN_EXPORT html
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</div>
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#+END_EXPORT
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* Mathematics :deck:
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** Item1 :note:
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:PROPERTIES:
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:ANKI_NOTE_TYPE: Cloze
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:END:
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*** Text
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The dot product of two vectors is {{c1::$|\alpha| \cdot |\beta| \cos{\varphi}$}}
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*** Extra
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** Item2 :note:
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:PROPERTIES:
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:ANKI_NOTE_TYPE: Basic
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:END:
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*** Front
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Given two vectors:
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\begin{equation*}
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\alpha = \{a_1, a_2, a_3\}, \beta = \{b_1, b_2, b_3\}
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\end{equation*}
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What's the result of $\alpha \cdot \beta$ ?
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*** Back
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\[a_1b_1 + a_2b_2 + a_3b_3\]
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