| #Model | |
| @user.should have(1).error_on(:username) # Checks whether there is an error in username | |
| @user.errors[:username].should include("can't be blank") # check for the error message | |
| #Rendering | |
| response.should render_template(:index) | |
| #Redirecting | |
| response.should redirect_to(movies_path) |
After upgrading to Mountain Lion, I got this message when trying to run my local rails server:
Installing rmagick (2.13.1) with native extensions
Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.
Users/user/.rvm/rubies/ruby-1.9.3-rc1/bin/ruby extconf.rb
There are lots of representations for strings. In most languages they pick one set of tradeoffs and run with it. In haskell the "default" implementation (at least the one in the prelude) is a pretty bad choice, but unlike most other languages (really) good implementations exist for pretty much every way you can twist these things. This can be a good thing, but it also leads to confusion, and frustration to find the right types and how to convert them.
| defmodule Life do | |
| def run(board) when is_binary(board) do | |
| board |> parse_board |> run | |
| end | |
| def run(board) do | |
| IO.write("\e[H\e[2J") | |
| Life.print_board board | |
| :timer.sleep 1000 | |
| board = next_board(board) |
| (* Functor SortedList.Make resembling Map.Make and Set.Make | |
| it is an artificial data structure similar to the normal list, but keeps elements sorted | |
| *) | |
| module type ORD = sig | |
| type t | |
| val compare : t -> t -> int | |
| end |
At DICOM Grid, we recently made the decision to use Haskell for some of our newer projects, mostly small, independent web services. This isn't the first time I've had the opportunity to use Haskell at work - I had previously used Haskell to write tools to automate some processes like generation of documentation for TypeScript code - but this is the first time we will be deploying Haskell code into production.
Over the past few months, I have been working on two Haskell services:
I will write here mostly about the first project, since it is a self-contained project which provides a good example of the power of Haskell. Moreover, the proces
http://www.legofoundation.com/
Lots of great reasearch on childhood, learning and play. The research I cited can be found as PDFs on this page. Five Types of Play under Future of Play and Motivations of Play under Systematic Creativity in the Digital Realm
http://www.joanganzcooneycenter.org/publications/
Research center for children's learning through digital media, by Sesame Street people.
Docker is a tool for bundling together applications and their dependencies into images that can than be run as containers on many different types of computers.
Docker and other containerization tools are useful to scientists because:
| Today we'll be looking into Kmett's | |
| [adjunctions](http://hackage.haskell.org/package/adjunctions) library, | |
| particularly the meat of the library in Data.Functor.Adjunction. | |
| This post is a literate haskell file, which means you can load it right up in | |
| ghci and play around with it! Like any good haskell file we need half a dozen | |
| language pragmas and imports before we get started. | |
| > {-# language DeriveFunctor #-} | |
| > {-# language TypeFamilies #-} |
Last updated March 13, 2024
This Gist explains how to sign commits using gpg in a step-by-step fashion. Previously, krypt.co was heavily mentioned, but I've only recently learned they were acquired by Akamai and no longer update their previous free products. Those mentions have been removed.
Additionally, 1Password now supports signing Git commits with SSH keys and makes it pretty easy-plus you can easily configure Git Tower to use it for both signing and ssh.
For using a GUI-based GIT tool such as Tower or Github Desktop, follow the steps here for signing your commits with GPG.
