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iOS

Posted by Nika Elashvili
Nika Elashvili
5,201 Points

Can I replace Indexes in Swift array?

can I replace Indexes in array? For example:

var todo = [ "Finish collection course", "Buy groceries", "Response to emails", "Order book online" "Pay bills" ]

If I want to move [0] on place of [2] and index [4] on place of index [1].

I dont know if I’ll ever need it but just curious.

Jhoan Arango
Jhoan Arango
13,603 Points

There are different methods on doing this.. but as a quick answer. Yes

3 Answers

jcorum
jcorum
71,814 Points

Here's one way:

var todo = [ "Finish collection course", "Buy groceries", "Response to emails", "Order book online", "Pay bills" ]

let temp = todo.removeAtIndex(0)  //take out the one you want to move
todo.insert(temp, atIndex: 1)  //insert it where you want it to go
print(todo)

The print output is:

["Buy groceries", "Finish collection course", "Response to emails", "Order book online", "Pay bills"]

Note: there's a comma missing between the last two elements of your array in the code you pasted in above.

Nika Elashvili
Nika Elashvili
5,201 Points

Thanks. That's what I thought but I Wanted to know if there is some other easier (handy) way than "todo.removeAtIndex" and then "todo.insert"

jcorum
jcorum
71,814 Points
jcorum
jcorum
71,814 Points

Actually, there is, but you need to use inout parameters:

swap(&todo[0], &todo[1])
Nika Elashvili
Nika Elashvili
5,201 Points
Nika Elashvili
Nika Elashvili
5,201 Points

Great, that makes sense :) Thank you.