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What is the appeal of dynamically-typed languages?

Kris Nuttycombe asks:

I genuinely wish I understood the appeal of unityped languages better. Can someone who really knows both well-typed and unityped explain?

I think the terms well-typed and unityped are a bit of question-begging here (you might as well say good-typed versus bad-typed), so instead I will say statically-typed and dynamically-typed.

I'm going to approach this article using Scala to stand-in for static typing and Python for dynamic typing. I feel like I am credibly proficient both languages: I don't currently write a lot of Python, but I still have affection for the language, and have probably written hundreds of thousands of lines of Python code over the years.

View ummutable.scala
import scala.collection.mutable.ListBuffer
class Ummutable[T] private (buf: ListBuffer[T]) {
def this(xs: T*) = this(ListBuffer() ++= xs)
def append(ys: T*): this.type = { buf ++= ys ; this }
final val xs: List[T] = buf.toIterable match { case xs: List[T] => xs }
override def toString = s"Ummutable(xs = ${xs mkString ", "})"
substack / dotslashtaskdotjs.markdown
Created Jan 8, 2014
introducing ./task.js, THE new javascript task runner automation framework
View dotslashtaskdotjs.markdown

why ./task.js?

One word: task automation. It's basically zero effort and you can use the ./task.js package manager to handle any repetitive tasks. You can use ./task.js to automate everything with minimum effort.

./task.js provides the structure, order, and authority that you as a developer so desperately crave. ./task.js will also take responsibility for your actions if you need it to. It's what everybody is using now. ./task.js is the new hotness. It's all about ./task.js now, just like that.

This is compared to npm run/bash scripts, which are:

dypsilon /
Last active Jan 12, 2020
A badass list of frontend development resources I collected over time.
viktorklang / InterruptibleCancellableFuture.scala
Last active May 29, 2019
View InterruptibleCancellableFuture.scala
Copyright 2018 Viktor Klang
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
Unless required by applicable law or agreed to in writing, software
View gist:5075355
My thoughts on writing tiny reusable modules that each do just one
thing. These notes were adapted from an email I recently sent.
If some component is reusable enough to be a module then the
maintenance gains are really worth the overhead of making a new
project with separate tests and docs. Splitting out a reusable
component might take 5 or 10 minutes to set up all the package
overhead but it's much easier to test and document a piece that is
substack / beat.js
Created Dec 10, 2012
more baudio music
View beat.js
var baudio = require('baudio');
var b = baudio({ rate : 44100, channels : 1 });
b.addChannel(function (t) {
return baseline(t) * 8;
b.addChannel(function (t) {
return baseline(t) + Math.sqrt(melody(t));
huynhjl / play_cygwin.patch
Created Jun 16, 2012
Patch for play and framework/build to run under cygwin and mingw32
View play_cygwin.patch
diff -r --unified play-2.0-orig/framework/build play-2.0-cygwin/framework/build
--- play-2.0-orig/framework/build 2012-03-12 20:25:28.000000000 -0700
+++ play-2.0-cygwin/framework/build 2012-06-15 17:56:57.436000000 -0700
@@ -8,4 +8,4 @@
-java ${DEBUG_PARAM} -Xms512M -Xmx1536M -Xss1M -XX:+CMSClassUnloadingEnabled -XX:MaxPermSize=384M -Dfile.encoding=UTF8 -Dplay.version="${PLAY_VERSION}" -Dsbt.ivy.home=`dirname $0`/../repository -Dplay.home=`dirname $0``dirname $0`/sbt/ -jar `dirname $0`/sbt/sbt-launch.jar "$@"
\ No newline at end of file
+java ${DEBUG_PARAM} -Xms512M -Xmx1536M -Xss1M -XX:+CMSClassUnloadingEnabled -XX:MaxPermSize=384M -Dfile.encoding=UTF8 -Dplay.version="${PLAY_VERSION}" -Dsbt.ivy.home=`dirname $0`/../repository -Dplay.home=`dirname $0`$BOOTPROP`dirname $0`/sbt/ -jar `dirname $0`/sbt/sbt-launch.jar "$@"
ziadoz /
Last active Dec 16, 2019
Awesome PHP — A curated list of amazingly awesome PHP libraries, resources and shiny things.
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