View class_ancestors.rb
module A | |
def func | |
p 'A' | |
super | |
end | |
end | |
class B | |
def func | |
p 'B' |
View array_to_hash.rb
require 'benchmark' | |
require 'benchmark/ips' | |
seed = [1,2,3] | |
map_proc = ->(i){ [i,i] } | |
Benchmark.ips do |x| | |
x.report('inject') { seed.inject({}){ |mem, i| mem[i]=i; mem } } | |
x.report('to_h') { seed.map(&map_proc).to_h } | |
x.report('Hash[map]') { Hash[seed.map(&map_proc)] } |
View capybara_chrome.rb
# spec/support/capybara_chrome.rb | |
require 'selenium/webdriver' | |
require 'capybara/rspec' | |
require 'capybara-screenshot/rspec' | |
RSpec.configure do | |
Capybara.server = :puma | |
Capybara.server_port = 5000 |
View lazy_chaining.rb
require 'benchmark' | |
require 'benchmark/ips' | |
NORMAL_ITERATIONS = 100 | |
LONG_ITERATIONS = 2000 | |
def map_to_self(array, iterations) | |
iterations.times do | |
array = array.map{ |i| i } | |
end |
View _while_true_vs_loop.rb
require 'benchmark' | |
MAX = 10**8 | |
puts Benchmark.measure{ | |
a = MAX | |
while(true) | |
a -= 1 | |
break if a == 0 |
View bitwise_operators_in_ruby.rb
require 'benchmark' | |
require 'benchmark/ips' | |
seed = 1239012 | |
Benchmark.ips do |x| | |
x.report('bitwise multiplication by 2') { seed << 1 } | |
x.report('arithmetic multiplication by 2') { seed * 2 } | |
x.report('bitwise division by 2') { seed >> 1 } |
View Several GitHub accounts
$ ssh-add ~/.ssh/id_rsa_some_other_github_account_name | |
$ git clone git@some_other_github_account_name.github.com:community/repo.git | |
# Add to repo/.git/config the `name` section like this | |
# [user] | |
# name = some_other_github_account_name | |
# email = some_other_github_account_name@users.noreply.github.com |