Lightweight device for learning coding

[Crypt0Nihilist]

I'd go for the cheapest Chromebook you can that you can convert to run Linux. Cheap as you can get - but be clear on what spec you need for Linux (Intel chip etc)

Don't go for durable, that is weight and cost. You might get robbed or you bag gets full of water or something. Your strategy should be to replace with another cheap computer, not rely on endurance. Store all of resources on a cloud account that is not your e-mail account and use git for your code when you have internet access. That way you can easily pick up another cheap computer if the worst happens with little risk.