CODEWITHSUNDEEP
arraysstringsortingswift3
Sjakelien
Sjakelien

Reputation: 2317

Swift 3: sort array of filenames independent from extension

Consider this array:

let files = ["file2.tif", "file33.jpg", "file11.jpg"]

I would like to sort this array so the result would be

sortedFiles = ["file2.tif", "file11.jpg", "file33.jpg"]

There are two problems here that I don't know how to approach:

1) how to ignore the file extension when sorting

2) how to make sure that "file2" is put in front of "file11"

Thank you so much for your insights

Upvotes: 1

Views: 503

Answers (1)

vadian
vadian

Reputation: 285082

An option is to cast the strings to NSString and use Foundation methods deletingPathExtension and compare:options:.numeric 

let files = ["file2.tif", "file33.jpg", "file11.jpg"]

let sortedFiles = files.sorted(by: {
   return ($0 as NSString).deletingPathExtension.compare(($1 as NSString).deletingPathExtension, options: .numeric) == .orderedAscending
})

Upvotes: 2

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