Israel Valverde ipvalverde

ipvalverde / noop_rollback_in_nested_transaction.rb

Last active December 24, 2025 15:11

	# frozen_string_literal: true

	require "bundler/inline"

	gemfile(true) do
	source "https://rubygems.org"

	# Use Rails directly from GitHub (main branch - nightly/edge)
	gem "rails", github: "rails/rails", branch: "main"

ipvalverde / deadlock-transaction-mysql-adapters.rb

Created November 14, 2025 10:53

	#!/usr/bin/env ruby
	# frozen_string_literal: true

	# Reproduces a database deadlock in Rails with PostgreSQL/MySQL
	#
	# This script creates two threads that update records in opposite order,
	# reliably causing a database deadlock.
	#
	# Usage:
	# ruby deadlock_bug_report.rb

ipvalverde / csv_improve.rb

Created February 7, 2022 10:48

	# Small simplification on the CSV part II blog post - https://www.sitepoint.com/guide-ruby-csv-library-part-2/

	# Original code in the blog post
	def load_guests
	CSV.open('guests.csv', headers:true) do \|guest\|
	guests = guest.each
	guests.select do \|row\|
	row['Times arrived'].to_i > 10
	end
	end

ipvalverde / read-string-to-array.cs

Created September 30, 2018 21:19

Read Console string converting to int array

	int[] ar = Console.ReadLine()
	.Split(' ')
	.Where(token => !string.IsNullOrWhiteSpace(token))
	.Select(token => Convert.ToInt32(token))
	.ToArray();