04 Oct '15, 7pm

046 RR Objects in Rails Part 2

So, I saw I think… it was yesterday they had a patch that had been applied to Ruby 2 (which will become the next version of Ruby) that’s “Lazy Enumerable”. So the idea behind it is you can take some enumerable object, like an array and you can call the ‘.lazy’ method and then after that, you can chain on some iterators. So in the example with the post, they do a “map” and then a “select”. And there’s basically two things that happen there. One, because you’ve called lazy, the evaluation is not done immediately. So you just get like some lazy enumerable object, but it’s not done. You can think of that as much as same way the current version of Active Record does queries, right? When you call “where” or something like that, you just get back a lazy relation object that represents that query. And then when you are done chaining methods on it and you finally, in a view or some...

Full article: https://devchat.tv/ruby-rogues/046-rr-objects-in-rails-pa...

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