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Prevent a crash if no iOS languages in dot_learn #35
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The existing code crashes if lesson.dot_learn is empty, or otherwise does not contain a :languages key. This checks whether the languages exist before checking if they contain "swift" or "objc".
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The existing code crashes if lesson.dot_learn is empty, or otherwise does not contain a :languages key. This checks whether the languages exist before checking if they contain "swift" or "objc".
Closes #23 (and #30)
#staff