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Alphonse Cuccurullo
2,513 PointsJust a question on sorting.
a = ["r","l","l","o"]
a.sort! {|first,second,third,fourth| fourth <=> first }
Im trying to get grips with the custom sorting using the brackets and im trying to spell roll within the array can someone tell me why this isn't working?
1 Answer
Jason Anello
Courses Plus Student 94,610 PointsHi Alphonse,
The block for sort! should only take 2 parameters which are going to be 2 elements from the array.
Here's a link to the documentation for sort!: http://ruby-doc.org/core-2.2.0/Array.html#method-i-sort-21
The code samples show how to do a sort in ascending(default) order or descending order which is what you want.
a = [ "d", "a", "e", "c", "b" ]
a.sort! #=> ["a", "b", "c", "d", "e"]
a.sort! { |x,y| y <=> x } #=> ["e", "d", "c", "b", "a"]
The second example with the block should be what you're looking for.