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AlexVPopov / clojure.spec cheat
Last active February 21, 2020 07:08
A cheat sheet for clojure.spec

clojure.spec cheat sheet



(ns my.ns
  (:require [clojure.spec.alpha :as s]))

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AlexVPopov /
Created December 21, 2017 15:31
1) Ruby2D::Image#contains? returns true if point is inside image
Failure/Error: ext_init(@path)
undefined method `ext_init' for #<Ruby2D::Image:0x007fbbaaa08c60>
# ./lib/ruby2d/image.rb:27:in `initialize'
# ./test/image_spec.rb:13:in `new'
# ./test/image_spec.rb:13:in `block (3 levels) in <top (required)>'
RSpec.describe Person do
let(:person) {'Fixed', 'Name', education_level, educator) }
describe '#educate' do
let(:education_level) { 2 }
let(:educator) { instance_double('PersonEducator') }
let(:updated_education_level) { education_level + 1 }
subject { person.education_level }
def read_price(selector)
elmenent = $driver.find_element(id: selector)
rescue Selenium::WebDriver::Error::NoSuchElementError
"Euer Return-wert"
return elmenent.attribute("value").to_s if elmenent == "NUM_HR_VSU"
elmenent.text().gsub(' €', '').gsub(',', '.')
# User.joins(accounts: :broker_server)
SELECT "users".*
FROM "users"
INNER JOIN "broker_accounts"
ON "broker_accounts"."user_id" = "users"."id"
AND "broker_accounts"."state" IN ('new', 'active', 'inactive', 'disabled', 'out-of-money')
INNER JOIN "broker_servers"
ON "broker_servers"."id" = "broker_accounts"."broker_server_id"
WHERE "users"."active" = 't'
AlexVPopov /
Last active August 29, 2015 14:24
How to define fabricators of models with polymorphic associations

Let's say you have the following models:

class Admin < ActiveRecord::Base
  has_one :login, as: :loginable

class User < ActiveRecord::Base
  has_one :login, as: :loginable
#!/usr/bin/env bash
uninstall() {
list=`gem list --no-versions`
for gem in $list; do
gem uninstall $gem -aIx
gem list
gem install bundler
__foo__ = "This foo sentence contains many foo instances, for example: foo, foo, foo."
* Match a single symbol: `foo.match /./ # => #<MatchData "T">`
* Match the first-found word character symbol: `foo.match /\w/ => #<MatchData "T">`
* Extract all symbols of a string: `foo.scan /./ # => ["T",
" ",
AlexVPopov / to_proc_spec.rb
Created December 5, 2013 15:31
Tests for challenge 11 of the FMI ruby course
require 'spec_helper'
ivan = 'Иван', 10, :second
mariya = 'Мария', 12, :first
neycho = 'Нейчо', 9, :third
students = [ivan, mariya, neycho]
describe "Array#to_proc" do
it "works for a single element" do