ibsusu

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.

If you are getting this in gdb on macOS while trying to run a program:

Unable to find Mach task port for process-id 57573: (os/kern) failure (0x5).
 (please check gdb is codesigned - see taskgated(8))

Open Keychain Access
In menu, open Keychain Access > Certificate Assistant > Create a certificate
Give it a name (e.g. gdbc)

running:

bash create-vod-hls.sh beach.mkv

will produce:

    beach/
      |- playlist.m3u8
 |- 360p.m3u8

	/*
	# Chat with ChatGPT

	## <span class="text-primary">👉 Note: LangChain is still in development. This script will keep updating to use the latest APIs</span>

	Use `Kit` -> `Manage npm Packages` -> `Update a Package` -> `langchain` to update to install the latest version.

	- Opens the `chat` component
	- Type a message and press `enter` to send
	- The message is sent to the OpenAI API

	<!--
	Go to Line 153 for the start of Uniform Buffer Object related code and intro

	Prerequsite:

	You at least know what uniforms are in the context of WebGL
	and mininally understand the concepts involved in creating a square in WebGL
	-->

	<html>

	// Thank you to the folks at the C++ slack channel,
	// along with @lewissbaker for the excellent literature
	// (even though it took me a few days to be convinced
	// it really was so).

	#include <uv.h>

	#include <iostream>
	#include <experimental/coroutine>

	// Tracking cursor position in real-time without JavaScript
	// Demo: https://twitter.com/davywtf/status/1124146339259002881

	package main

	import (
	"fmt"
	"net/http"
	"strings"
	)

	#!/usr/bin/env python2
	import requests
	from tqdm import tqdm
	import re
	import os

	def download_file_from_google_drive(id, destination):
	URL = 'https://docs.google.com/uc?export=download'

	session = requests.Session()


	#include <iostream>

	#include <grpc++/grpc++.h>
	#include <grpc++/security/credentials.h>

	#include "pubsub.grpc.pb.h"

	int main(int argc, char** argv) {
	auto channel = grpc::CreateChannel(“pubsub.googleapis.com”, grpc::GoogleDefaultCredentials());

	/**
	* This source file is used to print out a stack-trace when your program
	* segfaults. It is relatively reliable and spot-on accurate.
	*
	* This code is in the public domain. Use it as you see fit, some credit
	* would be appreciated, but is not a prerequisite for usage. Feedback
	* on it's use would encourage further development and maintenance.
	*
	* Due to a bug in gcc-4.x.x you currently have to compile as C++ if you want
	* demangling to work.