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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.

chrismccoy

# alias to edit commit messages without using rebase interactive
# example: git reword commithash message
reword = "!f() {\n  GIT_SEQUENCE_EDITOR=\"sed -i 1s/^pick/reword/\" GIT_EDITOR=\"printf \\\"%s\\n\\\" \\\"$2\\\" >\" git rebase -i \"$1^\";\n git push -f;\n}; f"

# count total commits in a repo
git rev-list --all --count

# edit all commit messages 
git rebase -i --root

marcel

#!/usr/bin/env ruby

# giftube – Generates an animated gif from a YouTube url.
#
# Usage:
#
#   giftube [youtube url] [minute:second] [duration]
#
#   ex.
#