This is probably fairly simple. I want to sort a set of tuples first by the second value, and then by the first value, like this:
julia> a = [ rand(1:3,2) for i in 1: 5 ]
5-element Array{Array{Int64,1},1}:
[2, 1]
[3, 2]
[3, 2]
[1, 1]
[2, 1]
julia> sort!(a, by = x -> x[2])
5-element Array{Array{Int64,1},1}:
[2, 1]
[1, 1]
[2, 1]
[3, 2]
[3, 2]
julia> sort!(a, by = x -> x[1])
5-element Array{Array{Int64,1},1}:
[1, 1]
[2, 1]
[2, 1]
[3, 2]
[3, 2]
The result is perfectly fine. However, I am somewhat unsure if the result of the second sorting might be dependent on the sorting algorithm used. Am I safe with that?
In this case I really don’t care about performance, but I wonder if there is a special function or syntax for this kind of thing.
8 posts - 4 participants
