Question

I am tryiing to port some python code to ruby, and I am doing pretty well, using equivelent ruby functions, even removing / altering some to use ruby features more.
However at a core point I need to get slices from an array
in python the following works fine:

output=["Apple","Orange","Pear"]
team_slices=[(0,1),(1,2),(2,3)]
for start,end in team_slices:
    print output[start:end]

Will output as expected:

['Apple']
['Orange']
['Pear']

Whereas the ruby code:

output=["Apple","Orange","Pear"]
team_slices=[[0,1],[1,2],[2,3]]
team_slices.each do |start,ending|
    print output[start..ending]
end

Will output:

["Apple","Orange"]
["Orange","Pear"]
["Pear"]

Is there any way to do the slicing more equivalent to python? I know I am likely missing somethign simple here

Answer 1

Seems like python’s ranges exclude the end value, so just use the ... variant in ruby:

output=["Apple","Orange","Pear"]
team_slices=[[0,1],[1,2],[2,3]]
team_slices.each do |start, last|
  print output[start...last]
end

PS: In ruby you should use 2 spaces for indentation, if you want to stick to conventions 😉

EDIT| Had to rename end to last due to ruby using it as a syntactical keyword.