Zade Viggers zadeviggers

So you want to modify the text of a PDF by hand...

If you, like me, resent every dollar spent on commercial PDF tools, you might want to know how to change the text content of a PDF without having to pay for Adobe Acrobat or another PDF tool. I didn't see an obvious open-source tool that lets you dig into PDF internals, but I did discover a few useful facts about how PDFs are structured that I think may prove useful to others (or myself) in the future. They are recorded here. They are surely not universally applicable --
the PDF standard is truly Byzantine -- but they worked for my case.

	// A handy bookmarklet to display comments from the top-rated Hacker News thread related to the current page
	// Written with the help of GPT-4

	javascript:(function() {
	const createCommentElement = (comment, depth) => {
	const commentWrapper = document.createElement('div');
	commentWrapper.style.paddingLeft = (depth * 20) + 'px';
	commentWrapper.style.marginBottom = '10px';
	commentWrapper.style.marginLeft = '10px';
	commentWrapper.style.color = '#333';

	// Here are some snippets from the file that loads all my article's markdown files and does processing on them
	// including generating the json file for search
	import * as fs from "fs";
	import path from "path";

	const publicDirectory = path.join(process.cwd(), "public");

	// At the bottom of the function that populates the cache of articles...
	const searchFile = JSON.stringify(
	articles.map((article) => ({

	/**
	* This module is used at providing an easy way to override material-ui
	* `shadows` properties.
	* material-ui expects the shadows to be following a certain pattern.
	* (source: https://github.com/mui-org/material-ui/blob/master/packages/material-ui/src/styles/shadows.js)
	* This file is a slight adaptation (for colours) of the above material-ui source file.
	*
	* This module exports a `createShadows(hexColor: string): Array<string>` method
	* that takes a hex color (presumably from the configuration) and returns an array
	* of the 25 possible shadows matching the 25 elevations in material-ui.

	// the cache version gets updated every time there is a new deployment
	const CACHE_VERSION = 10;
	const CURRENT_CACHE = `main-${CACHE_VERSION}`;

	// these are the routes we are going to cache for offline support
	const cacheFiles = ['/', '/about-me/', '/projects/', '/offline/'];

	// on activation we clean up the previously registered service workers
	self.addEventListener('activate', evt =>
	evt.waitUntil(

	https://youtu.be/-C-JoyNuQJs?t=39m45s

	When I put the reference implementation onto the website I needed to
	put a software license on it.

	And I looked at all the licenses that were available, and there were a lot
	of them. And I decided that the one I liked the best was the MIT License,
	which was a notice that you would put on your source and it would say,
	"you're allowed to use this for any purpose you want, just leave the
	notice in the source and don't sue me."

	def easeInOutQuad(x: int \| float) -> int \| float:
	return 2 * x * x if x < 0.5 else 1 - pow(-2 * x + 2, 2) / 2

	{
	"emmet.includeLanguages": {
	"jinja-html": "html"
	}
	}