Olli Paloviita

navbar docs hamburger menu not showing fix

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## Brief description Currently https://www.getpapercss.com/docs/components/navbar/ collapsed navbar hamburger menu is invisible. This can be fixed by adding "border" to the bars. ## Sample pictures Firefox:  Chromium: 

NaN not handled properly?

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I'd want to check in one validation that `userInput` is number and larger or equal to zero. To enable `minNumber` check, I need to convert the user input String to...

Fix broken link

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In the concurrency chapter there is a broken link, which is accessible through [Wayback machine](http://web.archive.org/web/20100302024235/https://dustin.github.com/2010/02/28/running-processes.html). It seems that the author moved it from *dustin.github.com* to *dustin.sallings.org*. This commit fixes the...

To reproduce (based on `getting_started/asyncio/driving/drive_raw_motors.py`): ```python import asyncio import logging from sphero_sdk import SpheroRvrAsync from sphero_sdk import SerialAsyncDal from sphero_sdk import RawMotorModesEnum # setup and test logging logging.getLogger().setLevel(logging.INFO) logging.info("Now the...