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Another update

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Yann Esposito (Yogsototh) 2012-01-18 15:36:33 +01:00
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multi/blog/Yesod-tutorial-for-newbies.md
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@ -2,7 +2,7 @@
isHidden: false
menupriority: 1
kind: article
created_at: 2011-12-28T15:14:40+02:00
created_at: 2012-01-15T19:14:40+02:00
en: title: Haskell web programming
en: subtitle: A Yesod tutorial
fr: title: Site en Haskell
@ -51,7 +51,7 @@ Haskell is an order of magnitude faster than interpreted languages
like [Ruby][haskellvsruby] and [Python][haskellvspython][^speeddigression].
Haskell is a high level language and make it harder to shoot you in the foot
than `C` or `C++` for example.
than `C`, `C++` or `Java` for example.
One of the best property of Haskell being:
> "If your program compile it will be
@ -60,29 +60,23 @@ One of the best property of Haskell being:
Haskell web frameworks handle parallel tasks perfectly.
For example even better than node.js[^nodejstroll].
<%= leftblogimage("thousands_smiths.jpg","Thousands of Agent Smith") %>
From the pure technical "point of vue",
Haskell seems to be the perfect web development tool.
Weaknesses of Haskell certainly won't be technical but human:
Weaknesses of Haskell certainly won't be technical:
- Hard to grasp Haskell
- Hard to find a Haskell programmer
- The Haskell community is smaller than the community for X
- The Haskell community is smaller than the community for `/.*/`
- There is no [heroku](http://heroku.com) for Haskell (even if [Greg Weber did it](http://www.yesodweb.com/blog/2011/07/haskell-on-heroku), it was more a workaround).
<%= leftblogimage("thousands_smiths.jpg","Thousands of Agent Smith") %>
I won't say these are not important drawbacks.
But, with Haskell your web application will have both properties
to absorb an impressive number of parallel request securely
and to adapt to change.
I don't say these are not important drawbacks.
But Haskell is certainly the best technical choice.
It makes it possible to handle an impressive number of connexions.
I believe Haskell is the best choice if you efficiency,
security and ability to adapt.
Furthermore, the Haskell community is great and learning Haskell
is fun and will make you a better programmer.
Focusing on Web Application, instead of reinventing the wheel, we should
choose an existing web framework.
Actually there are three main choices:
Actually there are three main Haskell web frameworks:
1. [Happstack](http://happstack.com)
2. [Snap](http://snapframework.com)
@ -715,15 +709,8 @@ Here is the content of `template/article.hamlet`:
<article> #{articleContent article}
</code>
This is the end of this tutorial.
I made it very minimal.
If you want to go further, you should take a look at the
recent [i18n blog tutorial](http://yesodweb.com/blog/2012/01/blog-example).
It will be obvious I inspired my own tutorial on it.
You'll learn in a very straightforward way how easy it is to use authorizations,
Time and internationalization.
Just for fun, try to enter an article with the following content:
The blog system is finished.
Just for fun, you can try to create an article with the following content:
<code class="html">
<p>A last try to <em>cross script</em>
@ -733,3 +720,14 @@ Just for fun, try to enter an article with the following content:
<p> And Here is the last </p>
"); DROP TABLE ARTICLE;;
</code>
## Conclusion
This is the end of this tutorial.
I made it very minimal.
If you want to go further, you should take a look at the
recent [i18n blog tutorial](http://yesodweb.com/blog/2012/01/blog-example).
It will be obvious I inspired my own tutorial on it.
You'll learn in a very straightforward way how easy it is to use authorizations,
Time and internationalization.
The example on also add a comment system.