I have list of user profiles. I need to sort the user profile based on following criteria as shown below:
profile_claimed(boolean) -> profile_complete_status(integer) -> No_of_friends(integer)
code:
user_profiles.sort { |x| [x.claim ? 0 : 1, x.complete_profile_status, x.no_of_friends] }
How to sort the user profile?
You could use sort_by:
user_profiles.sort_by do |x|
[(x.claim ? 0 : 1), x.complete_profile_status, x.no_of_friends]
end
Also, it is worth noting that sort_by is usually faster than sort because it caches the result of the comparison operation, which in this case is
(x.claim ? 0 : 1), x.complete_profile_status, x.no_of_friends
and does not recalculate the values for each comparison between two elements.
You need to use sort method with block:
ary.sort do |x,y|
if x > y
1
elsif x < y
-1
else
0
end
end
Just make sure to return +1 when x follows y, -1 when y follows x, or 0 when they are equal.
sort is the basic building block for sorting, it often falls down badly when the values being sorted have to be computed or dug out of a structure or object. Instead, use sort_by, which uses a Schwarzian Transform, resulting in major speed improvements.