Haskell Language Learning Note (YESOD)

Source: Internet
Author: User

Yesod

Yesod is a WEB framework that uses the Haskell language.

Installing Yesod

First update Haskell Platform to the latest version
(Yesod relies on a lot of libraries, the version is inconsistent, it is easy to install failure)

$ cabal install yesodInstalled yesod-1.4.5
Hello World
-- helloworld.hs{-# LANGUAGE OverloadedStrings     #-}{-# LANGUAGE QuasiQuotes           #-}{-# LANGUAGE TemplateHaskell       #-}{-# LANGUAGE TypeFamilies          #-}import           Yesoddata HelloWorld = HelloWorldmkYesod "HelloWorld" [parseRoutes|/ HomeR GET|]instance Yesod HelloWorldgetHomeR :: Handler HtmlgetHomeR = defaultLayout [whamlet|Hello World!|]main :: IO ()main = warp 3000 HelloWorld
$ runhaskell helloworld.hs[Info#yesod-core] Application launched @(yesod-core...

Type inside the Web browser
http://localhost:3000
Get the following page

<!DOCTYPE html>

Haskell Language Learning Note (YESOD)

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