In swift, I want to compare two different indexes in the same array. Right now, My code is something like:
var myArray:[String] = ["1" , "1", "2"]
for i in myArray{
if(myArray[i] == myArray[i + 1]){
// do something
}
}
From this, I get an error:
Cannot convert value of type 'String' to expected argument type 'Int'
How do I go about fixing this?
Not a direct answer to your question but if what you want is to compare adjacent elements in a collection what you need is to zip the collection with the same collection dropping the first element:
let array = ["1" , "1", "2"]
for (lhs,rhs) in zip(array, array.dropFirst()) {
if lhs == rhs {
print("\(lhs) = \(rhs)")
print("do something")
} else {
print("\(lhs) != \(rhs)")
print("do nothing")
}
}
This will print:
1 = 1
do something
1 != 2
do nothing
For-each construction (for i in array) does not provide you with an index, it takes elements from a sequence.
You may want to use ranges like this to aquire indices:
for i in 0 ..< array.count
for index in array.indices {. Check this How to iterate a loop with index and element in Swift