I'm looking to basically match up two different arrays in Swift using the enumerated method. So if I have:
let array1 = ["a", "b", "c", "d"]
let array2 = ["1", "2", "3", "4"]
I need to return a new array that would read:
newArray = ["1. a1", "2. b2", "3. c3", "4. d4"]
How do I make an array like that?
You can use zip method for this:
let res = zip(array1, array2).map {"\($1). \($0)\($1)"}
Note that this approach repeats the item from array2 at the beginning and at the end. If the number at the beginning is supposed to be an index, use this expression instead:
let res = zip(array1, array2).enumerated().map {"\($0+1). \($1.0)\($1.1)"}
enumerated() by itself operates on a single sequence. zip takes two sequences, and merges them into one. You can use enumerated first, and then grab the index, and apply it to the second sequence, but it is error-prone in situations when the first sequence is longer than the second one.This Solve your problem
let array1 = ["a", "b", "c", "d"]
let array2 = ["1", "2", "3", "4"]
var newArray: [String] = []
for (index, element) in array1.enumerated() {
newArray.append("\(array1[index]). \(array2[index])\(array1[index])")
}
I managed to figure it out with some help from a friend:
var newArray: [String] = []
for (index, array1) in array1.enumerated() {
newArray.append("\(index + 1). \(array1)(\(array2[index]))")
}
return newArray
Thanks!
array2[i]or the index? In other words, what should be the result whenarray2is["p", "q", "r", "s"],["p. ap", "q. bq", "r. cr", "s. ds"]or["1. ap", "2. bq", "3. cr", "4. ds"]?