holyjak

Unsorted notes on Fulcro RAD.

Reports

Displaying to-one :ref attributes

Tony advises:

There are two primary ways to do this. If it is a true to one relationship, then you can simply make a resolver from person ID to address ID in pathom and then you can just include address things as columns. The other option, which works for any cardinality, is to use the report option ro/column-EQL and write a join that pulls the information you want to format in the column, and then supply a column formatter to do the formatting of the nested data.

hzoo

Programming as Theory Building

Peter Naur, 1985

PDF: http://pages.cs.wisc.edu/~remzi/Naur.pdf

Introduction

The present discussion is a contribution to the understanding of what programming is. It suggests that programming properly should be regarded as an activity by which the programmers form or achieve a certain kind of insight, a theory, of the matters at hand. This suggestion is in contrast to what appears to be a more common notion, that programming should be regarded as a production of a program and certain other texts.

olivergeorge

Introduction

Stuart talking about them as part of the Day of Datomic videos:

https://youtu.be/ZP-E2IgqKfA?t=2412

Simple data structure

Simple data structure for anomalies.

robert-stuttaford

Query basics

{:db/ident       :meta/tag
 :db/valueType   :db.type/tuple
 :db/tupleAttrs  [:meta/tag-namespace :meta/tag-key :meta/tag-value] ;; all unique strings
 :db/cardinality :db.cardinality/one
 :db/unique      :db.unique/identity}

Then

pjstadig

The Pledge

One thing that always made me a little sad about transducers was how map lost its ability to iterate multiple collections in parallel. This is actually my favorite feature of map. For example:

(map + (range 5) (range 5 10))
=> (5 7 9 11 13)

One somewhat practical use of this is if you want to compare two sequences, pairwise, using a comparator. Though I wish that every? took multiple collections, this is an adequate substitute:

robert-stuttaford

(require '[cljs.build.api :as api]
         '[clojure.string :as string]
         '[figwheel-sidecar.repl-api :as figwheel]
         '[figwheel-sidecar.components.nrepl-server :as figwheel.nrepl])

(def source-dir "src")

(def compiler-config
  {:main          'app.main
   :output-to     "target/app.js"

pjstadig

(ns typehint.core)

;; A little type hint hint...

(set! *warn-on-reflection* true)

;; There are two ways to type hint the return value of a function, but one is
;; (technically) wrong:

(defn ^String as-string0

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>

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.

auramo

## Using Emacs CIDER as the Figwheel REPL tool

project.clj should have this line:

```
  :figwheel { :nrepl-port 7888 }
```
At the defproject-level.

It enables external tools to connect to the Figwheel REPL. To connect