How to get the second element from the last in Julia

user_17818896 0
Viewed 330

Is there any way to do this in Julia?

#Python
lst = [1, 2, 3]
print(lst[-2]) # prints out 2

I know last function gets the last one, but I want to get the second one from the last.

Thanks!!

julia vector arrays
1 Answers

Within the context of array indexing, end can be used as a special syntax to represent the last index of the array, whatever that may be. So lst[end-1] is what you're looking for.

julia> lst = [1, 2, 3];

julia> lst[end-1]
2

You might want to check out the Python section of Julia's "Noteworthy Differences from Other Languages" page. A few of the relevant notes from that page:

  • Julia does not support negative indices. In particular, the last element of a list or array is indexed with end in Julia, not -1 as in Python.
  • Julia requires end for indexing until the last element. x[1:] in Python is equivalent to x[2:end] in Julia.
user_136397340
Related