Morning.

morning 😮

Morning

halloo there

morning

Bore da pawb

pawb?

Everyone? I think - could well be wrong!

Lo

måning

o/

Yep! Good morning everyone

\o (greet "everyone")

(map #(str "Ahoy hoy " %) clojure-uk-pals) o/

Morning folks!

Noob question

(fn [& args] … ) can you do the args bit with #( )

turns out yes 😄

> %& for the rest of the arguments after the highest individually referenced argument

https://cljs.github.io/api/syntax/function

yeah! just saw it thanks @lady3janepl

(TIL for me, thanks for bringing it up!)

no worries me too

i was just doing some code golf

trying to reduce this horror

(fn[& x](fn[& a](map #(apply %1 a)x)))

but 4clojure doesnt allowed nested anon (or maybe its clojure dnno)

clojure doesn't allow nested anon

yeah

I would consider that a horror in and of itself. The call signature you're in seems whacky though.

4clj makes this worse due to how the tests work really.

yeah

http://www.4clojure.com/problem/59

just doing that one

i got to 33 for code golf, gimmie a shout if u give it ago 😂

Makes perfect sense then 🙂

I don’t think anything allows nested anon

eyyyyyyy @conor.p.farrell welcome dude!

finally more manchester clojure representation

imagine being in a programming community where you didn't know everyone by their first name? 😮

🙂

makes me think we should have more cryptic user names more than anything else 😉

I really just mean that it's not all bad that we're such a small group.

Socially it's pretty great.

😄

this is a really friendly and helpful little corner of the internet imo

I agree 🙂

@dominicm Imagine a programming community that NEVER calls me by my first name 🙂

lovingly

🙂

What up @alex.lynham

welcome to the party

if someone offers you illegal parentheses please don't take them and report them to the correct authorities

(conj clojure-uk-pals "Conor")

Clojure noob question 2.).

(defn reductions
  "Returns a lazy seq of the intermediate values of the reduction (as
  per reduce) of coll by f, starting with init."
  {:added "1.2"}
  ([f coll]
   (lazy-seq
    (if-let [s (seq coll)]
      (reductions f (first s) (rest s))
      (list (f)))))
  ([f init coll]
   (if (reduced? init)
     (list @init)
     (cons init
           (lazy-seq
            (when-let [s (seq coll)]
              (reductions f (f init (first s)) (rest s))))))))

To me it looks like they are deref-ing init

that is indeed what's happening

init is a reduced

to get a value out of a reduced you deref it

user=> @(reduced 1)
1

a bit like an orange

go on

no thats all

no you have to follow through now

you've committed

to get value out of an orange you deref it

How do you know its reduced sorry

you have to write a blog post about how reduceds are like oranges

@guy (if (reduced? init) :)

Sorry how does it become reduced might be a better way of phrasing

i think im not grokking how it works

f might return a reduced

reduced is a way of returning early with a value

(reductions (fn [acc el] (if (> el acc) (reduced acc) (+ el acc))) colls)

imagine this

that guard in reductions is testing against (f acc el) returning a reduced

if it does, it stops the reduction

:thinking_face:

by returning just (cons @init nil) instead of (cons init (rest of reductions))

(if (reduced? init) So this is more to do with the function passed into reductions rather then the function itself?

well no

there's two parts to this

ok

*like an orange

1- reductions needs to support early termination of f, by testing for reduced? on the accumulator 2- f can tell reductions to terminate the reduction early by returning a reduced value

so the bit in reductions is the "consumer" bit, the bit in f is the "producer"

it's a bit easier to understand this in terms of reduce than reductions

user=> (reduce (fn [acc el] (println el) (if (> el 3) (reduced acc) (+ acc el))) (range 10))
1 2 3 4
6

do you understand what reduced does in this example?

it tells reduce "ok, stop consuming the collection and performing the reduce operation, just return acc

when el is > than 3

yep!

for (el : coll) { 
   if el > 3 then
      break;
   else
     acc += el
}

in java it would be like this

it's a useful concept with transducers too - this blog post has some more about it https://dev.to/greencoder/build-your-own-transducer-and-impress-your-cat---part-4-2bp8

noice

start at part 1?

or read that one

transducers compose backwards, start from the end :P

well that one is relevant in terms of what reduced is

kk

just as an aside

@guy that implementation of reductions is quite easy and compact, focus on the [f init coll] arity, drop the lazy-seq, play around with returning a reduced from f and then remove that reduced? check and see how it behaves

you'll get it in no time

oki doki ill give it ago! thanks

🍊

All this talk of oranges and no one mentioned chocolate 😞

oh dear

well we've not seen the blog post yet 🙂

or the whimsical talk at the conj

i'm sure @danieleneal was talking about this

now I'm hungry

chocolate orange is my favourite

Well we always knew that that healthy != tasty, and chocolate == tasty. Once we discovered that fruit == healthy, it was only a matter of time since someone invented a substitute.

I used to like chocolate oranges

Nowadays i dnno, i’ve become a bit of a chocolate purist

I don't actually like chocolate

I just use it as a cream/sugar delivery mechanism

So by that reckoning, Dairy Milk is the best thing ever

@carr0t is there nothing else which satisfies that?

@guy green & black?

@dominicm Oh yeah, tons of stuff. Choc Orange, Toblerone, Dairy Milk. My point was more that actually nice chocolate often doesn't (because it's dark, or whatever)

My wife gets a monthly Hotel Chocolat box (delivered to my work these days, since the dog ate one that came to the house). I get most of the fruity/white/fondant ones, she gets all the darks/nutty ones

that seems like a good deal :thumbsup:

I especially get all the ones involving orange, as she's allergic

@carr0t Oh, I meant cream/sugar delivery, as opposed to chocolate 😄

Oh right 😆 Well, yes, but they can be more work. And I like creamy, sugary milk chocolate

But I do sometimes just mix up icing sugar and melted butter and a little bit of peppermint essence in a mug, and eat it with a spoon. Basically peppermint cream mix

You're some sort of mutant, Dan

what

And when I was in college I worked weekends in a bakery and used to have a pasty and a 1kg block of Regalice ready-to-roll icing for lunch. Somehow I am neither diabetic nor the size of a house, but that's more luck than judgement

And I tried it again back when I was about 22/23 and got a massive sugar crash headache. Not done it since

a 1kg block of icing

@carr0t I imagine raw cookie mix would suit your tastes, but drop the egg

and the jelly cubes before they are made into jelly

1kg????!!!??

damn danm

Oh yeah. First dessert I learned to make was syrup sponge in the microwave. I used to make a double batch, eat half raw, cook the rest. That was when I was about 8

Also yes, jelly cubes are amazing. Though we don't normally have them in the house these days as we rarely eat jelly

@dominicm If it's anything like the chunks in Ben & Jerry's Cookie Dough Ice Cream, then yes. Best flavour

gosh

Also it being the UK, I would imagine we don't even have to drop the egg. Raw egg is fine over here. Not so much in the US. Don't know about the rest of the EU

@carr0t I always eat it, but I wasn't sure about the rules. Interesting that it's a US problem.

@carr0t seriously, 1g brown sugar, 2g soft butter and 3g flour (you can probably drop/reduce this, you're not making cookies). Mix in a bowl and scale this to your hearts desire and enjoy.

All eggs sold in the UK have to come from vaccinated chickens, cannot be washed (which to a certain extent requires the farmers to keep them in cleaner conditions, as noone want an egg covered in crap), and we keep them (in the supermarket) outside the fridge.

The US washes their eggs (which means they can be kept in dirtier conditions without people 'knowing', and also washes off the protective coating [egg bloom] and leaves them porous, which means they absorb contaminants more easily). They also don't mandate vaccination of their chickens. Those two combined means they have to keep their eggs in the fridge, even in the supermarket

think just eggs with the lion mark come from vaccinated chickens

And their eggs are generally said to be unsafe to eat raw, whereas ours are OK

@minimal You could be right

However

> The Food Standards Agency says "Lion Mark" eggs, which include almost all of the eggs produced in the UK, are virtually free of salmonella. From https://www.bbc.co.uk/news/health-41568998

but your point still stands in general

https://www.theguardian.com/notesandqueries/query/0,5753,-26086,00.html now I'm wondering about the fridge

general impression seems to be that eggs prefer constant temperature. So shelf in supermarket, fridge (not in door) at home.

we have eggs in a bowl in the shade

never had a problem

does anybody else think that:

💪:face_with_raised_eyebrow:🎉

looks like the canonical emoji for serious party

@carr0t 1kg sugar = 4kcal... ~2 days of calories for lunch! how did you avoid becoming a diabetic house?

@mccraigmccraig I honestly don’t know. I’m 6’2” (about 188cm), have been since I was 15/16. Until I was 18 I ate whatever I wanted and stayed about 10.5 stone (66-67kg). I was unhealthily thin. At Uni that went up a bit, but only to a more healthy weight. Then I got to 28 and suddenly it all appeared and I had to start watching what I eat (though the cycling helps)