cat is valid only for atomic types (logical, integer, real, complex, character) and names. It means you cannot call cat on a non-empty list or any type of object. In practice it simply converts arguments to characters and concatenates so you can think of something like as.character() %>% paste().

Understanding the Context

print is a generic function so you can define a specific implementation for a certain S3 class. The cat <<EOF syntax is very useful when working with multi-line text in Bash, eg. when assigning multi-line string to a shell variable, file or a pipe. Examples of cat <<EOF syntax usage in Bash: linux - How does "cat << EOF" work in bash?

Key Insights

- Stack Overflow xnew_from_cat = torch.cat((x, x, x), 1) print(f'{xnew_from_cat.size()}') print() # stack serves the same role as append in lists. i.e. it doesn't change the original # vector space but instead adds a new index to the new tensor, so you retain the ability # get the original tensor you added to the list by indexing in the new dimension python - `stack ()` vs `cat ()` in PyTorch - Stack Overflow Is there replacement for cat on Windows [closed] Asked 17 years, 7 months ago Modified 1 year ago Viewed 553k times 46 There are a few ways to pass the list of files returned by the find command to the cat command, though technically not all use piping, and none actually pipe directly to cat. The simplest is to use backticks (`): cat `find [whatever]` This takes the output of find and effectively places it on the command line of cat. unix - How to pipe list of files returned by find command to cat to ...

Final Thoughts