seisvelas

8 queens (wiki explanation), as well as its variant n queens, was one of the first really 'hard' toy problems I did at Hola<Code /> (Hi people who look down at bootcamp alumni. I understand you. But still go fuck yourself). First I did it in Python with backtracking and a global store of solutions. Then I did it statelessly in Racket, then in Javascript, then back around to Python. here is my Node.js version (stateless):

var {range} = require('range')
        
function isThreatened(board, pos) {
  return board.includes(pos) ||

seisvelas

import requests

def has_new_gh_action(repo):
    raw_url = f'https://raw.githubusercontent.com/FlowCrypt/{repo}/master/.github/workflows/check-for-emails.yml'
    raw_action_request = requests.get(raw_url)
    if raw_action_request.status_code != 200:
        print(f'error checking repo {repo}, status code {raw_action_request.status_code}')
        return False
    return 'exemptions' in raw_action_request.text

seisvelas

# Simple version of cp command

import sys

if len(sys.argv) < 3:
    raise Exception('too few arguments')

command, source, destination, *rest = sys.argv

with open(source, 'rb') as source_file:

seisvelas

I'm Xandre, a security engineer. Code to me is like a vast ocean, and I want to reach the sea floor and map it all out.

---

I love finding security bugs in open source software.

This blog isn't static - it uses GitHub Gists as a backend. I've made an NPM package in case you also want a more convenient way to host a blog on GitHub Pages: https://www.npmjs.com/package/@xandrev/gistblog

To learn more about my work, check out my portfolio

seisvelas

python3 -c 'with open("secure_sigalgs") as f: print("jdk.tls.server.SignatureSchemes=" + ",".join([i.rstrip() for i in f.readlines()]))'

seisvelas

extern crate cifar_10_loader;
extern crate image;
use cifar_10_loader::CifarDataset;
use std::fs::File;
use std::collections::HashMap;

fn main() {
    let mut label_ids = HashMap::new();

    label_ids.insert(0, "airplane");

seisvelas

const { range } = require('range');

const sieve = (field) =>
  // initialize
  (typeof field === 'number')
  ? sieve(range(2, field))
  
  // recursive case
  : (field.length)
    ? [field[0]].concat(

seisvelas

En el trabajo hoy estoy haciendo un VIEW de unas tablas de Salesforce. Como nunca había usado Salesforce, me sorprendió que las tablas acabaron con __c, y no entendí porque pasa eso, así que pregunté a mi jefe. El mi respondió que es una cosa que hace Salesforce por alguna razón. Juj. Pues eso lo vi bien raro, entonces me puse a buscar 'Por que las tablas de Salesforce acaban con __c, cual búsqueda me condujo a la siguiente pregunta en StackOverflow:

https://salesforce.stackexchange.com/questions/101844/what-are-the-object-and-field-name-suffixes-that-salesforce-uses-such-as-c-an

Super interesante! No se necesita una entrada en el blog para este datito pero fue tan al azar, ¡no pude resistir! No me juzguen amigos, por favor. Lo triste/feliz es que la companía ya se ha movido de Salesforce. No tendré que usarlo, pero la verdad un parte de mi lo quise aprender bien. Salesforce es como so propio mundo de raridades.

seisvelas

This is not a static blog. It dynamically loads all of my GitHub Gists that begin with blog_. This presented a challenge as to how I would implement RSS, considering I don't have a backend from which I can build the RSS feed, and I also can't statically generate the feed with each deploy, as a Jekyll blog might do.

Wut do? My boring compromise (for now!) is to make a simple Heroku app that calls the Gist API to grab the blog posts, just like this blog does. Except instead of actually rendering the Gists into a blog, I give an RSS feed!

This should be a pretty fun, byte-sized task. Which makes it perfect for a blog post!

Divying the task into little pieces

This project can be divided into the following tasks:

1. Set up "Hello, world!" web app on Heroku

seisvelas

use reqwest::header::USER_AGENT;
use reqwest::header::CONTENT_TYPE;

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    let client = reqwest::Client::new();
    let res: Vec<serde_json::Value> = client
        .get("https://api.github.com/users/seisvelas/gists?page=1&per_page=100")
        .header(USER_AGENT, "Xandre's RSS")
        .header(CONTENT_TYPE, "application/rss+xml")