I'm having an array:
var myArray = ["","dfg","erte","","asd"]
How can I get the index of those elements which doesn't have ""..?
I have this code:
for i in myArray {
let index = myArray.firstIndex(where: {$0 == i})
}
This gives me the index of all elements. But I want the index of those elements which doesn't have ""
Here is an option is using filter
let range = myArray.indices.filter { !myArray[$0].isEmpty }
To access the array using range you can then do
for index in range {
print(myArray[index])
}
Of course if the end goal is to get an array of all non-empty values then you can filter on the array directly
let notEmpty = myArray.filter { !$0.isEmpty }
for i in myArray { let range = ... let id = self.myIDArray[range!] }
range
If your goal is to create an array of the indexes of all non-empty elements in your string array, you can do that using enumerated() and compactMap:
var myArray = ["","dfg","erte","","asd"]
let indexes = myArray.enumerated().compactMap { (index, value) in
value.isEmpty ? nil : index
}
print(indexes)
That outputs:
[1, 2, 4]
If, instead, you want the index of the first non-empty element, you could use code like this:
if let firstNonEmptyIndex = myArray.firstIndex(where: {!$0.isEmpty}) {
print("The entry at index \(firstNonEmptyIndex) is empty")
} else {
print("No entries in the array are empty.")
}
You can get index with offset value in here:
var str = ["","123","345","","789"]
for i in str.enumerated(){
if i.element != "" {
print(i.offset)
}
}
You can use compactMap it remove nil value too(if array has)
var myArrayIndex = myArray.enumerated().compactMap { (index, data) -> Int? in
if !data.isEmpty {
return index
}
return nil
}
print(myArrayIndex)
Sort way:
var myArrayIndex = myArray.enumerated().compactMap{!$0.element.isEmpty ? $0.offset : nil}
print(myArrayIndex)
index, which you then discard on the next pass through the loop. What is your desired output. You say 'I want the index of those elements which [don't contain] "".' Does that mean you want to create an array containing the indexes of every array element that is not empty?which doesn't have ""You mean the string that aren't empty?