I am looking for a proper way to sort by ascending or descending a complex array.
arr = [[100, 200, 300], [100, 250, 600], [50, 10, 1030]]
I would like to sort this array based on the target value [value, value, target_value]
I have my own way to do this but it seems ugly and slow.
Do we have a proper way to do this in ruby?
Thanks in advance.
Or even shorter like this:
arr.sort_by(&:last)
If you need it in descend order:
arr.sort_by(&:last).reverse
To do the sorting and reversing in two steps seems laborious, but it is actually faster than the sort {} syntax.
[[100, 200, 300], [100, 250, 600], [50, 10, 1030]].sort_by{|x| x[2]}
.reverseHere's a way to do it more explicitly:
arr.sort { |a, b| a[2] <=> b[2] }
For a descending sort, just reverse the order:
arr.sort { |a, b| b[2] <=> a[2] }
