daveliepmann

When to use assert?

In JVM Clojure, Exceptions are for operating errors ("something went wrong") and Assertions are for programmer and correctness errors ("this program is wrong").

An assert might be the right tool if throwing an Exception isn't enough. Use them when the assertion failing means

• there's a bug in this program (not a caller)
• what happens next is undefined

henryw374

(ns flexi-clock
  (:import (java.time Clock Duration Instant ZonedDateTime)))

(defn clock 
  "potential library function (e.g. in tick or tempo).
  
  This just implements the platform Clock - which works because non-test code only uses that API.
   Any manipulation of time (which happens in testing code) is done via changing
  what get-instant and get-zone return"
  [get-instant get-zone]

WebReflection

This is a simple demo of how latest Bun could've implemented .as(Class) instead of using the quite jurassic Object.create which is slow, bloated due descriptors logic, if used at all, and incapable to play nicely with features introduced after Object.create was even specified.

// what `as(Class)` should return
const { assign } = Object;
const asClass = new WeakMap;
const setAsClass = Class => {
  class As extends Class {
    constructor(fields) {
      assign(super(), fields);

rafd

FlowStorm Quickstart

FlowStorm is a time-travelling debugger for clojure.

IMO, Clojure has the best development experience with its REPL-driven workflow. FlowStorm makes it even better.

Most notably:

• "time-traveling" retrospective debugger (walk forward and backward, search for values)
• zero-config tap> destination
• retroactively add print statements to previous evaluations

shvets-sergey

(ns jst
  (:require [camel-snake-kebab.core :as csk]
            [clojure.string :as string]
            [hyperfiddle.rcf :refer [tests]]))

(hyperfiddle.rcf/enable!)
;; Implements a hiccup compiler into js-template. 
;;
;; Usage: (jst cljs-symbol? template-fn? hiccup), where:
;;  cljs-symbol - what symbol implements js-template in cljs (default: shadow.cljs.modern/js-template)

WebReflection

About

Highly Experimental

If you are using this already, consider changes soon due the discussion around current ESX proposal.

Feel free to keep an eye on udomsay as that will be the implementation reference for consumers.

---

spacegangster

;; UPD hey, I'm not sure now if those zones are correct throughout the year
;; see this https://www.creativedeletion.com/2015/01/28/falsehoods-programmers-date-time-zones.html
;; Sorry for misleading you
[{:option/value "Pacific/Tarawa"               :option/label "(GMT +12:00) Tarawa"}
 {:option/value "Pacific/Auckland"             :option/label "(GMT +12:00) New Zealand Time"}
 {:option/value "Pacific/Norfolk"              :option/label "(GMT +11:00) Norfolk Island (Austl.)"}
 {:option/value "Pacific/Noumea"               :option/label "(GMT +11:00) Noumea, New Caledonia"}
 {:option/value "Australia/Sydney"             :option/label "(GMT +10:00) Australian Eastern Time (Sydney)"}
 {:option/value "Australia/Queensland"         :option/label "(GMT +10:00) Australian Eastern Time (Queensland)"}
 {:option/value "Australia/Adelaide"           :option/label "(GMT +9:30) Australian Central Time (Adelaide)"}

ataggart

(defproject example "0.1.0"
  :description "Example configuration for using log4j2 as the concrete logging
                implementation. Libraries that depend on other well-known java
                logging abstractions (e.g., SLF4J) will be logged with log4j2.
                Also configures tools.logging to choose log4j2."

  :dependencies [; Provide the log4j2 logging implementation:
                 [org.apache.logging.log4j/log4j-api "2.13.0"]
                 [org.apache.logging.log4j/log4j-core "2.13.0"]
                 ; Provide log4j2 adapters for other java logging abstractions:

holyjak

Source code for my Telia Full Stack Feast talk "Want more from your frontend framework!" (slides) (6/2020), comparing Redux with REST and a Fulcro with Pathom (Graph API).

Use case we are implementing: Show “hot deals” in your webshop, loaded on-demand.

PS: For the sake of simplicity I am cheating a little and presenting the Fulcro HotDeals component as a root component. If it was used as a child, we would need to either change the a Link Query or make sure that the :deals are presented as a property on the parent component. Also, I use unqualified keys for brevity. This is not recommended in practice.

saikyun

#!/usr/bin/env bb

(if *command-line-args*
  (def in (str (first *command-line-args*)))
  (do
    (println "Which bin to run?")
    (def in (str *input*))))

(println "Watching" "*.zig" "->" (str "./" in))