Re: Possible to defer initialization of let variable?
Re: Possible to defer initialization of let variable?
- Subject: Re: Possible to defer initialization of let variable?
- From: Rick Mann <email@hidden>
- Date: Tue, 07 Jul 2015 01:33:05 -0700
Yeah, there doesn't seem to be an elegant way to do it, so I gave up and used a var.
> On Jul 7, 2015, at 01:31 , Quincey Morris <email@hidden> wrote:
>
> On Jul 7, 2015, at 01:21 , Rick Mann <email@hidden> wrote:
>>
>> let thumbURL: String?
>> for imgD in images
>> {
>> if let isHero = imgD["is_hero"] as? Bool where isHero,
>> let t = imgD["thumbnail_signed_src"] as? String
>> {
>> thumbURL = t
>> break
>> }
>> }
>
> You’ve still got a path where ‘thumbURL’ is uninitialized — when ‘images’ is empty. I’m not sure if there’s an elegant way to do it, but you can do it by brute force something like this:
>
>> do
>> {
>> var url: String? = nil
>>
>> for imgD in images
>> {
>> if let isHero = imgD["is_hero"] as? Bool where isHero,
>> let t = imgD["thumbnail_signed_src"] as? String
>> {
>> url = t
>> break
>> }
>> }
>>
>> thumbURL = url
>> }
--
Rick Mann
email@hidden
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