Get indexes from one Array <String> for use it for second Array <String>-CodePudding

I have two Arrays String:

var labelOne: [String] = ["one", "two", "one", "four", "five"]

var idOne: [String] = ["sdcsadcasdc", "sad213e123wd", "32dsqfdwf", "dsadcdasc", "32rfwec"]

Now in program, "one" = "sdcsadcasdc", "two" = "sad213e123wd", "one" = "32dsqfdwf", "four" = "dsadcdasc", "five = "32rfwec".

I have a filter for labelOne and put it in another Array String:

var result = "one"

var searchLabelOne = labelOne.filter { $0.lowercased().contains(result!.lowercased())}

I want to get filtered indexes from searchLabelOne and use it for get indexes from idOne. For this example, I would create Array String searchIdOne for searchLabelOne with "one" and "one" and he must be:

var searchIdOne = ["sdcsadcasdc", "32dsqfdwf"]

Please, help

CodePudding user response：

Well if you want to keep the data structures as the way they are, you can first get the indexes from firstArray.

Then iterate through secondArray to get elements at those indexes.

var searchIdOne = labelOne.enumerated().filter( {$0.element == result}).map({ $0.offset}).map({ idOne[$0]})

CodePudding user response：

Zip the arrays.

var labelOne: [String] = ["one", "two", "one", "four", "five"]
var idOne: [String] = ["sdcsadcasdc", "sad213e123wd", "32dsqfdwf", "dsadcdasc", "32rfwec"]
let result = zip(labelOne, idOne).filter {$0.0.contains("one")}.map {$0.1}
print(result) // ["sdcsadcasdc", "32dsqfdwf"]

(Adjust the filter predicate as desired, that was only a demo.)