> > > That said, metadata and its relationship to an object is immutable - an >> object with different metadata is a different object. One consequence of >> this is that applying metadata to a lazy sequence will realize the head of >> the sequence so that both objects can share the same sequence. >> > > What confuses you about it? Is it the "realize the head of the sequence" > part? >
I think I'm firstly confused by the use of the word object. I'm guessing in this case it refers to things that implement IObj? I'm then confused by what is meant that an object with different meta is a different object, if they are still equal? I'm guessing it means that if you change the meta on an IObj, you get a copy? And then I'm confused as to why that would cause lazy-seq to realize their head? Can't two lazy-seq share the same head? On Saturday, 4 November 2017 11:40:54 UTC-7, James Reeves wrote: > > On 3 November 2017 at 06:57, Didier <did...@gmail.com <javascript:>> > wrote: > >> Okay, I can see how I can maybe infer some of that by piecing together >> the code base, but if there was a book, or a reference somewhere describing >> more the implementation of Clojure itself I'd be interested to read it, if >> there is one out there. I'd understand if there's not, I know Clojure has >> no formal semantic spec. >> > > I don't know of one, I'm afraid. > > >> Also, I guess I'm still confused about that bit: >> >> > That said, metadata and its relationship to an object is immutable - an >> object with different metadata is a different object. One consequence of >> this is that applying metadata to a lazy sequence will realize the head of >> the sequence so that both objects can share the same sequence. >> > > What confuses you about it? Is it the "realize the head of the sequence" > part? > > -- > James Reeves > booleanknot.com > -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups "Clojure" group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
