cscalfani

module CSS.Cursor where

import Prelude

import CSS (CSS)
import CSS.Property (class Val, Value)
import CSS.String (fromString)
import CSS.Stylesheet (key)

newtype Cursor = Cursor Value

cscalfani

module Image.BookCover where

bookCover :: String
bookCover = "data:image/png;base64,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

cscalfani

module ChalkStyles
(
  Style
, black
, red
, green
, yellow
, blue
, magenta
, cyan

cscalfani

module ChalkStyles where

newtype Style = Style String

black :: Style
black = Style "black"

red :: Style
red = Style "red"

cscalfani

const http = require("http");

const hostname = "0.0.0.0";
const port = 3000;

const server = http.createServer((req, res) => {
  console.log(`\n${req.method} ${req.url}`);
  console.log(req.headers);

  const reverseArray = a => {

cscalfani

module Main where

import Prelude

import Control.Monad.Except.Trans (ExceptT, runExceptT, throwError, catchError)
import Control.Monad.State.Trans (StateT, runStateT, get, put)
import Control.Monad.Writer.Trans (class MonadTell, WriterT, runWriterT, tell)
import Data.Either (Either)
import Data.Tuple (Tuple)
import Effect.Console as Console

cscalfani

cscalfani

cscalfani

How to Think About Monads 2

How to Think about Monads, starts with composition of pure functions and quickly transitioned to composition of pure functions with side-effects. If you haven't read it yet, please do. This continues where that left off.

By the end of that article, we created specialized composition functions that were equivalent to the Monadic bind.

From that article we can conclude that Monadic computations have the following properties:

1. Functions are executed sequentially
2. Optionally, control-flow can be short-circuited

cscalfani

foldr written the normal way and as the dual of unfoldr

The following code was inspired by Kwang's Haskell Blog post titled unfold and fold.

module Main where

import Prelude hiding (foldr)
import Data.Function ((&))