How to delete duplicates from an integer array?

Question

aliarda.f OP

Created Sep ’20

Replies 3

Boosts 0

Participants 2

How can I write a function which deletes the duplicates from an integer array ?

Answered by Claude31 in 631547022

Here is a brute force solution:

Code Block let originalArray = [1, 3, 6, 1, 2]
var strippedArray : [Int] = []
for item in originalArray {
    if !strippedArray.contains(item) {
        strippedArray.append(item)
    }
}
print(strippedArray)

You can make it generic:

Code Block func strip<T:Equatable>(_ array: [T]) -> [T] {
    var stripped : [T] = []
    for item in array {
        if !stripped.contains(item) {
            stripped.append(item)
        }
    }
    return(stripped)
}
strippedArray = strip(originalArray)
print(strippedArray)

If you don't mind loosing the order of the original array:

Code Block strippedArray = Array(Set(originalArray))

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Answer 1

Claude31 OP

Sep ’20

Accepted Answer

Here is a brute force solution:

Code Block let originalArray = [1, 3, 6, 1, 2]
var strippedArray : [Int] = []
for item in originalArray {
    if !strippedArray.contains(item) {
        strippedArray.append(item)
    }
}
print(strippedArray)

You can make it generic:

Code Block func strip<T:Equatable>(_ array: [T]) -> [T] {
    var stripped : [T] = []
    for item in array {
        if !stripped.contains(item) {
            stripped.append(item)
        }
    }
    return(stripped)
}
strippedArray = strip(originalArray)
print(strippedArray)

If you don't mind loosing the order of the original array:

Code Block strippedArray = Array(Set(originalArray))

1

Answer 2

Claude31 OP

Sep ’20

Did this answer your question ?

1

Answer 3

aliarda.f OP

Sep ’20

Yes man, thank you very much!!!

0