Isao Yagi isao

TCP echo server for Node.js

Usage

Make sure you have a modern-ish version of Node.js installed.
Type npx https://gist.github.com/kfox/1280c2f0ee8324067dba15300e0f2fd3
Connect to it from a client, e.g. netcat or similar: nc localhost 9000

I have an updated version of this on my blog here: https://chrisamico.com/blog/2023-01-14/python-setup/.

Python

This is my recommended Python setup, as of Fall 2022. The Python landscape can be a confusing mess of overlapping tools that sometimes don't work well together. This is an effort to standardize our approach and environments.

Tools and helpful links:

Python docs: https://docs.python.org/3/
Python Standard Library: - Start here when you're trying to solve a specific problem

Extract URL from Safari .webloc

bash one-liner

plutil -p example.webloc | sed -En 's/.*"(.*)"$/\1/p'

Convert all .webloc files in directory to .url files

webloc2url.sh - Converts .webloc (Mac) to .url (Windows) files.

In defense of blocks for local scopes (Part 2)

Some have leveled the criticism that "part 1" of this post is unnecessarily contriving a problem that doesn't really exist in "good code" -- if you really need to narrow a scope of some declarations in a function, then that function is too complex already and that bigger problem is what you need to fix.

Just to be extra clear: if a chunk of code is already reasonable to make a function, that's not the sort of code I'm talking about in either of these blog posts. If it's being called multiple times, or if it's completely independent and makes sense as its own logical chunk, make it a function. I'm talking about a different sort of code, a set of a few statements related to each other, that declare one or more variables, but which logically still belong inside another function. That's the context here.

OK, let's stop talking about this stuff abstractly.

A Real Example

In defense of blocks for local scopes (Part 1)

[EDIT: I've added a part 2 to this blog post, to address some of the feedback that has come up: https://gist.github.com/getify/706e5e10822a298375da40f9cc1fa295]

Recently, this article on "The JavaScript Block Statement" came out, and it received some good discussion in a reddit thread. But the general reaction seems to be against this approach. That saddens me.

Forth Links

Unsorted

Forth: Minimal, Chip [2022-06-07]

Git exclude vs .gitignore

It can be useful to exclude a file in local repo without using a .gitignore file, which is a best practice if the file is one you don't expect other users to generate themselves.

Add it to:

.git/info/exclude

You can also add this git alias, by adding it to your .gitconfig file in the [alias] section:

	// Prime checking regex, which this code is based off of
	// https://regex101.com/r/RIJkGF/1

	type StringDivisible<n extends string, div extends string> = n extends `` ? true : n extends `${div}${infer r}` ? StringDivisible<r, div> : false;

	type Substrings<n extends string, d extends string = ""> = n extends `${d}${infer r}` ? readonly [` ${d}`, ...Substrings<r, ` ${d}`>] : readonly [];
	type StringFactors<n extends string> = Substrings<n> extends readonly [unknown, ...infer R extends readonly string[], unknown] ? R : never;
	type StringIsPrime<n extends string, Factors extends readonly string[] = StringFactors<n>> = Factors extends readonly [infer s extends string, ...infer R extends readonly string[]] ? StringDivisible<n, s> extends true ? false : StringIsPrime<n, R> : true;

	type RepeatStringByStringDigit<str extends string, d extends string> =

	/* Ultra lightweight Github REST Client */
	// original inspiration via https://gist.github.com/v1vendi/75d5e5dad7a2d1ef3fcb48234e4528cb
	const token = 'github-token-here'
	const githubClient = generateAPI('https://api.github.com', {
	headers: {
	'User-Agent': 'xyz',
	'Authorization': `bearer ${token}`
	}
	})

	// Bookmarklet for [Pins.app](https://get-pins.app/) (requires version 1.6+)
	// Removes Google Analytics strings
	// Removes Product Hunt query string
	// Prefers canonical url if defined
	// Uses selected text for description, falling back to meta description
	// Removes pipes (\|) from title
	// To allow use on any website in Firefox, go to about:config and set security.external_protocol_requires_permission to false
	// Copy this to your URL bar:
	javascript:!function(){function e(e){var n="pins://launch?screen=newPost&",i=o();""===i&&(i=r()),n+="url="+encodeURIComponent(e),n+="&",n+="title="+encodeURIComponent(t()),n+="&",n+="description="+encodeURIComponent(i),document.location.href=n}function t(){var e=document.title;return e.replace(/\\|/g,"-")}function n(){for(var e=document.getElementsByTagName("link"),t=0;t<e.length;t++)if(e[t].attributes.hasOwnProperty("rel")&&"canonical"===e[t].attributes.rel.textContent.toLowerCase())return e[t].attributes.href.textContent;var n,o=document.location.href.split(/[?&]([^&]+)/