This list is based on aliases_spec.rb.
You can see also Module: RSpec::Matchers API.
| matcher | aliased to | description |
|---|---|---|
| a_truthy_value | be_truthy | a truthy value |
| a_falsey_value | be_falsey | a falsey value |
| be_falsy | be_falsey | be falsy |
| a_falsy_value | be_falsey | a falsy value |
| ruby -cw filename.rb # checks for syntax errors |
initialize: once, when the controller is first instantiatedconnect: anytime the controller is connected to the DOM
| class ExampleJob < ApplicationJob | |
| queue_as :default | |
| def perform(user) | |
| # do some work | |
| # HACK: get around limitations in devise/warden when rendering | |
| # views outside the context of a formal http request | |
| renderer = ::ApplicationController.renderer.new | |
| renderer_env = renderer.instance_eval { @env } |
| FROM ruby:2.3.1 | |
| # Install dependencies | |
| RUN apt-get update -qq && apt-get install -y build-essential libpq-dev nodejs | |
| # Set an environment variable where the Rails app is installed to inside of Docker image: | |
| ENV RAILS_ROOT /var/www/app_name | |
| RUN mkdir -p $RAILS_ROOT | |
| # Set working directory, where the commands will be ran: |
| # sum elements in a list | |
| defmodule ListHelper do | |
| def sum([]), do: 0 | |
| def sum([head | tail]), do: head + sum(tail) | |
| end | |
| # if clause | |
| if condition, do: something, else: another_thing | |
| # cond |
| // asserting errors | |
| console.assert(condition, error to throw); | |
| // clear console logs | |
| console.clear() | |
| // number of times a function is called | |
| console.count(label) | |
| // displaying document | |
| console.dir(document.body); // shows as an object | |
| console.dirxml(document.body); // shows as xml | |
| // console error |
| hjkl- moving up, down, left , and right. | |
| x - deleting from a cursor | |
| :q! - quit without saving. | |
| :wq - quit and save | |
| dw - delete word until start of next word. | |
| d$ - delete entire line. | |
| de - delete word until end of current word. | |
| 2w - move cursor two word forward. | |
| 3e - move cursor to the end of the third word forward. | |
| 0 - move cursor to the start of teh line. |
| #list allcontainers | |
| docker container ls --all | |
| # run a docker container and show hostname | |
| docker container run alpine hostname | |
| # run an ubuntu container and access its shell | |
| docker container run --interactive --tty --rm ubuntu bash | |
| # running mysqlexample | |
| docker container run \ | |
| --detach \ | |
| --name mydb \ |