Kir Shatrov kirs

Using strace and lsof to debug blocked processes

You can use strace on a specific pid to figure out what a specific process is doing, e.g.:

strace -fp <pid>

You might see something like:

select(9, [3 5 8], [], [], {0, 999999}) = 0 (Timeout)

User.first.name # => "Renan"

User.first.name # => OpenSSL::Cipher::CipherError: bad decrypt

Разрабатывайте скрипты с опциями set -eu

максимально быстрое выявление скрытых ошибок в коде.
не надо самому писать многие проверки значений.
Это сделает shell-код похожим на нормальный язык программирования, а не на набор последовательно выполняющихся команд, которым на всё пофиг.

Get Homebrew installed on your mac if you don't already have it

Install highlight. "brew install highlight". (This brings down Lua and Boost as well)

	class Node
	attr_accessor :edges, :jobs, :id

	def initialize(id, arrivals_per_tick)
	@id = id
	@jobs = 0.0
	@tick = 0
	@edges = []
	@arrivals_per_tick = arrivals_per_tick
	end

	apt update
	apt upgrade
	apt install build-essential
	apt install pkg-config
	apt install libnet-dev python-yaml libaio-dev
	apt install libprotobuf-dev libprotobuf-c0-dev protobuf-c-compiler protobuf-compiler python-protobuf libnl-3-dev libcap-dev python-future

	# criu install
	curl -O -sSL http://download.openvz.org/criu/criu-3.10.tar.bz2
	tar xjf criu-3.10.tar.bz2

	#!/bin/bash
	# Pushes the current branch to origin and opens a tiny tmux split to track
	# the CI status. Upon completion, speaks the status aloud using `say`.
	set -e

	if [ "$1" != "--wait" ]; then
	git push -u origin HEAD
	tmux split-window -dv -l 2 "'$0' --wait"
	else
	ref="$(git rev-parse -q HEAD)"

	require "rubocop"

	module RuboCop
	module Cop
	module Lint
	# This cop checks bad use of the Minitest `assert` method
	#
	# `assert` method's second argument is the error message when the
	# first argument evals to false.
	#

	class MessageImageWorker
	@queue = :message_image_queue
	def self.perform(message_id, image_path)
	MessageImage.create!(message_id: message_id, image: image_path)
	end
	end