Re: cannot invoke 'substringToIndex' with an argument list of type '(Int)'
Re: cannot invoke 'substringToIndex' with an argument list of type '(Int)'
- Subject: Re: cannot invoke 'substringToIndex' with an argument list of type '(Int)'
- From: Roland King <email@hidden>
- Date: Tue, 07 Jul 2015 15:22:31 +0800
The docs for NSString say that substringToIndex is declared like that. If you looked at the autocomplete when you typed it in you’d see it wants an Index, that’s a method on String. And no it’s not in the documentation but it is in the API diffs and autocomplete gets it right (for me at least) and Cmd Clicking takes me there too.
If you want to use an NSString method with the same name as a String one, cast to an NSString, ( s as NSString )
same with substringFromIndex
and NSURL is a fallible initializer so you can’t return it like that, you unwrap it, or throw, or test it or something.
Your last mail about NSURLs didn’t make any sense either by the way. You were using .rawValue() on things typed as Strings, Strings don’t have raw values, so I think that isn’t really your code.
> On 7 Jul 2015, at 15:02, Rick Mann <email@hidden> wrote:
>
> What? The docs say that substringToIndex is declared like this:
>
> func substringToIndex(_ to: Int) -> String
>
> So, why can't I call that here:
>
> extension
> NSURL
> {
> func
> normalizedURLByAppendingPathComponent(var inComponent : String)
> -> NSURL
> {
> var s = self.absoluteString;
> if s.hasSuffix("/")
> {
> s = s.substringToIndex(s.characters.count - 1)
> }
>
> if inComponent.hasPrefix("/")
> {
> inComponent = inComponent.substringFromIndex(1);
> }
>
> s = s.stringByAppendingString("/");
> s = s.stringByAppendingString(inComponent);
>
> let u = NSURL(string: s);
> return u;
> }
> }
>
>
> --
> Rick Mann
> email@hidden
>
>
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