If you’re fine with a couple extra characters, you can use .isEmpty:
for name in names {
// do your thing
}
if names.isEmpty {
// do whatever
}
It’s a bit more typing, but I feel it makes your intentions more clear.
Saagar Jha
> On Feb 1, 2017, at 8:48 AM, Chris Davis via swift-evolution
> <[email protected]> wrote:
>
> Hi,
>
> Often when I’m programming I stumble upon this scenario:
>
> I have a list of items that may or may not be empty - if it’s full, I do one
> thing, if it’s empty I do something else, my code looks like this:
>
> class Example_1
> {
> let names = ["Chris", "John", "Jordan"]
>
> /// Loop over names, if no names, print no names
> func run()
> {
> for name in names
> {
> print(name)
> }
>
> if names.count == 0
> {
> print("no names")
> }
> }
> }
>
> let exampleOne = Example_1()
> exampleOne.run()
>
> However, Personally, I would find it more pleasing to write something like
> this:
>
> class Example_2_Proposed
> {
> let names:[String] = []
>
> /// Loop over names, if no names, print no names
> func run()
> {
> for name in names
> {
> print(name)
> } else {
> print("no names")
> }
> }
> }
>
> let exampleTwo = Example_2_Proposed()
> exampleTwo.run()
>
> The difference here is a “for-else” type syntax where if there were no items
> in the array it would simply fall through to the else statement.
>
> What would be the pros/cons of introducing such syntax?
>
> Is there’s a way of doing something similar in swift already?
>
> Thanks
>
> Chris
>
>
>
>
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