CODEWITHSUNDEEP
swifttuples
ielyamani
ielyamani

Reputation: 18581

Multi-level sort array of tuples in Swift

I want to sort an array of tuples [(Int,Int)] based on the .1 element (from largest to smallest), in case of equality compare .0 (from smallest to largest)

I am using this :

myArray.sort{ $0.0 != $1.0 ? $0.1 > $1.1 : $0.0 < $1.0}

but it's not working

Upvotes: 0

Views: 1729

Answers (1)

Martin R
Martin R

Reputation: 539715

The first term in the conditional expression is wrong. If you want to sort on the .1-component first (in decreasing order) then you have return $0.1 > $1.1 if these elements are different, otherwise compare the .0-components:

This should produce the expected result:

myArray.sort{ $0.1 != $1.1 ? $0.1 > $1.1 : $0.0 < $1.0 }
              ============
             difference here

Example:

var myArray = [ (1,1), (1,2), (2,1), (2,2)] 
myArray.sort{ $0.1 != $1.1 ? $0.1 > $1.1 : $0.0 < $1.0 }
println(myArray)
// [(1, 2), (2, 2), (1, 1), (2, 1)]

Upvotes: 5

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