[saagarjha]

These kinds of collections can be nice, but I think it’s fair to warn against looking at them too closely. Sometimes they’re not actually idiomatic and often the implementations have differences in them that see non-obvious.

[tgv]

And some have problems: the Python example of reading a file into a string is:

    lines = open(f).read()

which doesn't close the file. The second C example of this task is tricky, and seems to miss an offset.

The C and Go implementations of uniform random integer include the upper limit, the Python and Rust implementations don't.

And that's just from quickly browsing.