Haml, QED

This revision is from 2012/05/10 15:31. You can Restore it.

Haml is a simple lib for generating XHTML/XML without specifying needless parts.

It can be intimidating at first glance, because it seems so unlike the HTMLish stuff you're used to. Let's prove its superiority one feature at a time (this is a shortened version of http://haml-lang.com/tutorial.html ).

```
%atag{a: b}
```
is better than
```
<atag>…</atag>
```
```
%atag.aclass
```
is better than
```
%atag{class: "aclass"}
```
```
%atag#an_id
```
is better than
```
%atag{id: "an_id"}
```
```
#div_id
```
is better than
```
%div#div_id
```
```
= 3*2
```
is better than
```
<%= 3*2 %>
```

So, to put them together, compare the Erb of:

<div id="banner" class="shadowed" lang="en"><%= item.title %></div>

…versus the Haml of:

#banner.shadowed{lang: 'en'}= item.title

∎

BTW(Edit)

:markdown

Note(Edit)

These can be quickly tested in `pry` (which is

gem install pry{,-doc}

then

run `pry` from the shell - it's a better `irb`) with:

pry -rhaml

Haml::Engine.new('#testtest').render

…and, of course, if you find yourself doing this often, you could add

something like this to your ~/.pryrc —

def hammit haml

require 'haml'

Haml::Engine.new(haml).render

end

…then it's as simple as:

echo 'hammit %q{#testtest}' | pry

For Our King, Only

BTW(Edit)

Note(Edit)