05:29 <FromGitter> <didactic-drunk> How to restrict `foo(a)` to `not_nil` variant of `T`? ⏎ ⏎ ```class C(T) ⏎ def foo(a : T.not_nil)``` [https://gitter.im/crystal-lang/crystal?at=62302425d1b64840db68c020]

06:19 <FromGitter> <sheisekopf1267_gitlab> I'm completely stuck, I've been working on a project to build a scraper and no matter what I do I get a null error. The project is a web scraper, and what I'm doing is checking the first letter of each line. Heres the code:

06:19 <FromGitter> <sheisekopf1267_gitlab> #required shards ⏎ ⏎ #require http allows HTTP::Client.get command ⏎ ⏎ require "http" ... [https://gitter.im/crystal-lang/crystal?at=6230300dc435002500f045b1]

06:20 <FromGitter> <sheisekopf1267_gitlab> require "http" ⏎ ⏎ require "xml" ⏎ ⏎ xml = HTTP::Client.get("https://en.wikipedia.org/wiki/Balloon").body ... [https://gitter.im/crystal-lang/crystal?at=623030439bd1c71ecaa2cc85]

06:32 <FromGitter> <didactic-drunk> ```code paste, see link``` [https://gitter.im/crystal-lang/crystal?at=62303313c61ef0178e73bea6]

12:25 <FromGitter> <asterite> @didactic-drunk it can be done with macros, but it will be quite unpleasant. What are you trying to do?

12:58 <FromGitter> <Blacksmoke16> @sheisekopf1267_gitlab if you just want to select only `href` could prob just do something like

12:58 <FromGitter> <Blacksmoke16> ```code paste, see link``` [https://gitter.im/crystal-lang/crystal?at=62308d8d257a3578252e3614]

15:12 <FromGitter> <sheisekopf1267_gitlab> Sorry, I had to sleep for a bit. @Blacksmoke16 I'm just trying to select the href's.

15:23 <FromGitter> <Blacksmoke16> give that code a try then ^

16:01 <FromGitter> <didactic-drunk> @asterite `T` is user specified and may be `nil`. `C` reads an input channel with possibly `nil T`. `foo` returns `Array(T.not_nil)` of processed values

22:55 <FromGitter> <Blacksmoke16> @sheisekopf1267_gitlab get it working?