swannodette

(ns om.next.spec
  (:require [cljs.spec :as s]))

(s/def ::ident (s/and vector? (s/cat :ident keyword? :value #(not (coll? %)))))
(s/def ::join-key (s/or :prop keyword? :ident ::ident))
(s/def ::join (s/and (s/map-of ::join-key ::query) #(= (count %) 1)))
(s/def ::union (s/and (s/map-of keyword? ::query) #(> (count %) 1)))

(s/def ::param-expr
  (s/cat :query-expr ::query-expr

cgrand

;; warm up: balancing
=> (s/def ::balanced
     (s/* (s/cat :open #{'<} :children ::balanced :close #{'>})))
:user/balanced
=> (s/conform ::balanced '[< < > < > > < >])
[{:open <, :children [{:open <, :close >} {:open <, :close >}], :close >} {:open <, :close >}]
=> (s/conform ::balanced '[< < > < < > > > < >])
[{:open <, :children [{:open <, :close >} {:open <, :children [{:open <, :close >}], :close >}], :close >} {:open <, :close >}]

;; infix to prefix

ghadishayban

;;
;; Example usages at the bottom of the file
;;

(defn productions
  "Returns a sequence of values by repeatedly calling `produce!` until it
   returns `fin`. The sequence can be used lazily/caching or reducible/non-caching.

   The arity-2 variant's `produce!` takes no arguments and returns a value
     or the terminator.

chrisamaphone

Generativity Thought Experiment

Suppose I want to generate something, maybe:
- a number
- a string
- a list of numbers
- a set of parameters that define a 3d model
- a game level
- a poem
- a story

reborg

Rich Already Answered That!

A list of commonly asked questions, design decisions, reasons why Clojure is the way it is as they were answered directly by Rich (even when from many years ago, those answers are pretty much valid today!). Feel free to point friends and colleagues here next time they ask (again). Answers are pasted verbatim (I've made small adjustments for readibility, but never changed a sentence) from mailing lists, articles, chats.

How to use:

• The link in the table of content jumps at the copy of the answer on this page.
• The link on the answer itself points back at the original post.

Table of Content

pjstadig

(ns maps.core)

;; In Clojure you can fetch items from a map three different ways.  Which should
;; you use when?

(= "bar" ({:foo "bar"} :foo))     ; map as function
(= "bar" (:foo {:foo "bar"}))     ; key as function
(= "bar" (get {:foo "bar"} :foo)) ; `get` as function

;; <INCIDENTALLY>

BaseCase

Deconstruct 2017 Bibliography

Here are all of the resources mentioned by Deconstruct 2017 speakers, along with who recommended what. Please post a comment if I missed something or have an error!

DC 2017 Speakers' Choice Gold Medalist

• Seeing Like a State by James Scott

Books

• Public Opinion by Walter Lippmann (Evan Czaplicki)
• A Pattern Language by Christopher Alexander (Brian Marick)
• Domain Driven Design by Eric Evans (Brian Marick)

lewang

;;; `filter' **MAY** introduce chunkedness, therefore should only be used with
;;; pure functions.


(defn integers-from [n]
  (lazy-seq (cons n (do (print \.) (integers-from (inc n))))))
        ;;; ⇒ #'user/integers-from

(defn chunked-test [xs]
  (let [times-called (atom 0)

mfikes

This pages logs work being done on CLJS-2702 under Clojurists Together Q2 2018 Funding. Overall funding round work is being logged here.

This work in particular covers the first bullet:

• Come up with a way to accommodate a recent change in the Closure Library that currently prevents ClojureScript from upgrading to newer versions of this library.

Work is being done in this branch, and when work is complete, the squashed results will be submitted as a patch.

01-May-2018

Evidently, internal changes have been made in Closure Library to accomodate a more sophisticated dependency tracking mechanism. ClosureScript relies on the internal details, and this is why things broke. Fortunately, it appears that—while s

mfikes

This page logs work being done under Clojurists Together Q2 2018 Funding Round towards the ClojureScript project. High level progress reports will be published formally with Clojurists Together, but you can follow here if you are interested in low-level details, progress notes, etc.

Themes

The concrete themes identified include:

• Fixing CLJS-2702, which prevents us from upgrading to newer versions of Closure Library.
• Work on highly voted ClojureScript tickets. Please take some time and vote in this list of tickets in need of patches.
• Work on issues related to NPM dependency management. (In particular NPM issues in the list above will be given extra emphasis).