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

paultopia

(ns upload-file.core
  (:require [reagent.core :refer [render atom]]
            [cljs.core.async :refer [put! chan <! >!]])
  (:require-macros [cljs.core.async.macros :refer [go go-loop]]))

;; derived from https://mrmcc3.github.io/post/csv-with-clojurescript/
;; and based on reagent-frontend template. 

;; dependencies from project.clj in addition to clojure, clojurescript, and reagent:
;; [org.clojure/core.async "0.2.395"]

joepie91

Not all random values are created equal - for security-related code, you need a specific kind of random value.

A summary of this article, if you don't want to read the entire thing:

• Don't use Math.random(). There are extremely few cases where Math.random() is the right answer. Don't use it, unless you've read this entire article, and determined that it's necessary for your case.
• Don't use crypto.getRandomBytes directly. While it's a CSPRNG, it's easy to bias the result when 'transforming' it, such that the output becomes more predictable.
• If you want to generate random tokens or API keys: Use uuid, specifically the uuid.v4() method. Avoid node-uuid - it's not the same package, and doesn't produce reliably secure random values.
• If you want to generate random numbers in a range: Use random-number-csprng.

You should seriously consider reading the entire article, though - it's

sgergely

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Switch between background command line and MC: Ctrl + o
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