Luis Chaves Rodriguez lucharo

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.

Obfuscating Lua

I've had some fun ruining Python recently, but Python is what I use at work. I prefer to use other languages when I'm doing stuff for fun.

And obfuscation only really makes sense in fun and competition - given a suffeciently determined actor, your code will be reverse engineered. Unless you write it in Malboge.

For this particular experiment, I'll be using Lua 5.3. As I'll probably need to dive into some of the less portable functions to commit our atrocities, I can't guarantee it will run on other popular versions like Luajit or 5.1.

Obfuscating Python

Obfuscation isn't difficult in most programming languages. It's why we have "good practices" because it is so easy to hide what you mean in badly written code.

Obfuscation tends to be even easier in dynamic languages because of how forgiving they tend to be - and because they tend to give you direct access to the environment so that you can manipulate it.

Today, for fun, I'm going to obfuscate this code:

def _(n):

if n <= 0:

Permanent WSL DNS Fix (WSL 2.2.1+)

If you're encountering ping github.com failing inside WSL with a Temporary failure in name resolution, you're not alone — this has been a long-standing issue, especially when using VPNs or corporate networks.

This issue is now fixed robustly with DNS tunneling, which preserves dynamic DNS behavior and avoids limitations like WSL’s former hard cap of 3 DNS servers in /etc/resolv.conf.

DNS tunneling is enabled by default in WSL version 2.2.1 and later, meaning that if you're still seeing DNS resolution issues, the first and most effective fix is simply to upgrade WSL. Upgrading WSL updates the WSL platform itself, but does not affect your installed Linux distributions, apps, or files.

To upgrade WSL, follow these steps,

The PATH is an important concept when working on the command line. It's a list of directories that tell your operating system where to look for programs, so that you can just write script instead of /home/me/bin/script or C:\Users\Me\bin\script. But different operating systems have different ways to add a new directory to it:

Windows

The first step depends which version of Windows you're using:

If you're using Windows 8 or 10, press the Windows key, then search for and

How to Setup Automatic Uploads to Anaconda from Travis CI in 15 minutes

TL;DR: Edit .travis.yaml to install Anaconda and to run conda_upload.sh after testing. Edit meta.yaml to take in the environmental variables $VERSION and $CONDA_BLD_PATH. Create conda_upload.sh which sets the needed environmental variables, builds the tar archive, and uploads it to Anaconda. Finally edit some stuff on your Anaconda and Travis CI account so they can talk.

Intro

The following steps will detail how to automatically trigger Anaconda builds and uploads from Travis CI. This will only upload successful builds in the master branch and if there are multiple commits in a single day, it'll only keep the latest one. Both of these settings can easily be changed.

Edit .travis.yaml

First, edit .travis.yml so that it installs Anaconda.

install:

	{
	"dependencies": {
	"@actual-app/api": "^6.7.0",
	"dotenv": "^16.4.5",
	"openai": "^4.33.0"
	}
	}

	library(tidyverse)
	library(paletteer)
	library(gt)

	pizzaplace %>%
	mutate(type = case_when(
	type == "chicken" ~ "chicken (pizzas with chicken as a major ingredient)",
	type == "classic" ~ "classic (classical pizzas)",
	type == "supreme" ~ "supreme (pizzas that try a little harder)",
	type == "veggie" ~ "veggie (pizzas without any meats whatsoever)",

	// %%javascript
	window.executePython = function(python) {
	return new Promise((resolve, reject) => {
	var callbacks = {
	iopub: {
	output: (data) => resolve(data.content.text.trim())
	}
	};
	Jupyter.notebook.kernel.execute(`print(${python})`, callbacks);
	});

	# Bun is now officially supported and these environments variables are no longer needed. Keeping this gist for legacy purposes.

	# SKIP_DEPENDENCY_INSTALL=true
	# UNSTABLE_PRE_BUILD=asdf install bun latest && asdf global bun latest && bun i