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The character $ in a question can be confusing. #11

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bobkummerfeld opened this issue May 31, 2020 · 3 comments
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The character $ in a question can be confusing. #11

bobkummerfeld opened this issue May 31, 2020 · 3 comments
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@bobkummerfeld
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A question like:
Quiz title: Shell if

  1. What does this script print: NAME=Alice; if [ $NAME == Alice ] ; then echo Hi Alice!; fi

causes an infinite loop. If I remove the $ it works. I assume this is interacting with the LaTex math syntax. $$ seems to work..

I suggest adding to the documentation to point this out.
@bobkummerfeld
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bobkummerfeld commented May 31, 2020 •
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$$ is shown as $$ on the question. Is there a way of getting a single $ in the question? Also, \$ doesn't work - give infinite loop again.

gpoore added a commit that referenced this issue Jun 1, 2020
@gpoore
fixed catastrophic backtracking in LaTeX math regex (#11)
cd663c7
@gpoore gpoore added the bug Something isn't working label Jun 1, 2020
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gpoore commented Jun 1, 2020

It should work now in the dev version after the last commit; the $ will just pass through as $ if it isn't followed by another $ later that fulfills the LaTeX math pattern. The regex for finding LaTeX math was causing catastrophic backtracking.

@bobkummerfeld
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Works fine now - thanks!

@gpoore gpoore mentioned this issue Jun 24, 2020
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@astrojedi astrojedi mentioned this issue Aug 28, 2020
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