szajbus

deduplicate_queue = fn queue, offset ->
  {_, deleted_count} =
    Verk.Queue.range!(queue, offset)
    |> Enum.reduce({MapSet.new(), 0}, fn job, {seen, deleted_count} ->
      if MapSet.member?(seen, {job.class, job.args}) do
        case Verk.Queue.delete_job(queue, job) do
          {:ok, true} -> {seen, deleted_count + 1}
          _ -> {seen, deleted_count}
        end
      else

szajbus

CLI tricks

Git

Po pierwsze must-have alias w systemie (~/.bashrc lub ~/.zshrc)

alias g="git"

szajbus

#!/usr/bin/env ruby
require 'optparse'
require 'json'
require 'net/http'

options = {}
OptionParser.new do |opts|
  opts.banner = "Usage: es_bench.rb [options]"

  opts.on("-c COUNT", "--count=COUNT", "Number of requests") do |count|

szajbus

# Usage:
#
# redis = Redis.new(url: ENV["REDIS_URL"])
# keys = redis.scan_each(match: 'foo*', count: 1_000)
# keys.extend(EachWithProgress)
#
# keys.each_with_progress do |key|
#   redis.del(key)
# end

szajbus

class Buffer
  def initialize(size = 1_000, &blk)
    @size = size
    @callback = blk
    @queue = []
    @lock = Mutex.new
  end

  def <<(object)
    @lock.synchronize do

szajbus

require 'hashie_walker' # https://github.com/monterail/hashie_walker
require 'active_support/inflector'

hash = { 
  "CamelCased" => { 
    "AnotherOne" => { 
      "Foo" => "Bar", 
      "FooFooFoo" => "Dupa" 
    }
  }

szajbus

This gist shows buggy behavior of == in Ruby 1.8.7. This affects case equality (===) too because by default === calls == internally unless redefined in specific class (like Range or Regexp).

class A
  def ==(other)
    puts "In A: calling == against #{other}"
    super
  end
end

szajbus

#!/usr/bin/env bash

if ! which openssl > /dev/null; then
  echo Install openssl
  exit 1
fi

if ! which curl > /dev/null; then
  echo Install curl
  exit 1

szajbus

#!/bin/bash
# Filter requests to Rails application by IP address
#
# Usage:
#   tail -f log/production.log | log_filter.sh [IP]
#
#   By default tries to obtain current IP address from $SSH_CLIENT or by querying http://ifconfig.me
if [[ $# -eq 0 ]]; then
  if [[ -z $SSH_CLIENT ]]; then
    ip=$(curl -s http://ifconfig.me)

szajbus

# Finds equilibrium index of a sequence.
# Returns equilibrium index or -1 if no equilibrium exists.

def equi(arr)
  left  = sums(arr)
  right = sums(arr.reverse)
  for i in 1..(arr.length) do
    return (i-1) if left[i-1] == right[-i]
  end
  -1