There is also Rosalind for more data oriented challenges [1].
I haven't gotten too far, but the initial problems don't seem too hard in higher level languages. They are very good problems to get better at IO, string manipulation, and data wrangling in your language of choice though.
Same.
> I haven't gotten too far, but the initial problems don't seem too hard in higher level languages.
True. But the info boxes in the top are interesting and informative, those make it worth it to keep going.
> They are very good problems to get better at IO, string manipulation, and data wrangling in your language of choice though.
For me, it's also a way to peek into BioJulia and get some familiarity with it. (I don't mind "cheating" this way since this was my primary goal with the site anyway.) So far I'm pretty impressed by how fast it is!