This is the second part of a series about Algebraic Effects and Handlers.
Note: initially I planned a 3-part series, but since the current post on undelimited continuations ended up taking
This is the first post of a series about Algebraic Effects and Handlers.
There are 2 ways to approach this topic:
Both approaches are valuables and give different insights on the topic. However, not everyone (including me), has the prerequisites to grasp the concepts of Category theory and Abstract Algebra. On the other hand, the operational approach is accessible to a much wider audience of programmers even if it doesn't provide the full picture.
I started using React 3.5 years ago, and I still love it. It was such a well-designed solution that not much has changed since then, only superficial stuff like naming. What I learned then is still wholly applicable today because it's such a good idea (although now you can choose from many other libraries). On top of that, we now benefit from an entirely new architecture (fiber) without changing much.
A tiny (265 byte) utility to create state machine components using two pure functions.
The API is a single function that accepts 2 pure functions as arguments:
| import createAction from 'redux-actions/lib/createAction' | |
| import { create, read, update, destroy, params } from 'utils/xhr' | |
| import always from 'ramda/src/always' | |
| import assoc from 'ramda/src/assoc' | |
| import compose from 'ramda/src/compose' | |
| import concat from 'ramda/src/concat' | |
| import dissoc from 'ramda/src/dissoc' | |
| import flip from 'ramda/src/flip' |
| function getType (value) { | |
| let type = typeof value; | |
| if (type === 'object') { | |
| return value ? Object.prototype.toString.call(value).slice(8, -1) : 'null'; | |
| } | |
| return type; | |
| } | |
| [NaN, 0, 1, Infinity, // numbers | |
| null, undefined, false, 'str', // other primitives |
| <html> | |
| <body> | |
| <script type="text/javascript" src="//mozilla.github.io/pdf.js/build/pdf.js"></script> | |
| <script type="text/javascript"> | |
| var url = "https://docs.google.com/document/export?format=pdf&id=1ML11ZyyMpnAr6clIAwWrXD53pQgNR-DppMYwt9XvE6s&token=AC4w5Vg7fSWH1Hq0SgNckx4YCvnGPaScyw%3A1423618416864"; | |
| var pages = [], heights = [], width = 0, height = 0, currentPage = 1; | |
| var scale = 1.5; | |
| function draw() { |
| package org.example | |
| package auth | |
| import org.scalatra.auth.ScentryStrategy | |
| import org.scalatra.{CookieSupport, ScalatraBase} | |
| trait RedisClient { | |
| def get(key: String): Option[String] | |
| } |
| #!/bin/bash | |
| # CentOS rbenv system wide installation script | |
| # Forked from https://gist.github.com/1237417 | |
| # Installs rbenv system wide on CentOS 5/6, also allows single user installs. | |
| # Install pre-requirements | |
| yum install -y gcc-c++ patch readline readline-devel zlib zlib-devel libyaml-devel libffi-devel openssl-devel \ | |
| make bzip2 autoconf automake libtool bison iconv-devel git-core |
