Re: how to loop in lua page(not the php way) ?
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- Subject: Re: how to loop in lua page(not the php way) ?
- From: Romulo Bahiense <romulo@...>
- Date: 2007年3月15日 16:50:38 -0300
Mark Edgar wrote:
On 3/15/07, Tomas Guisasola Gorham <tomas@tecgraf.puc-rio.br> wrote:
<?lua
for i=1,10 do
?>
<p><%= tostring(i) %></p>
<?lua
end
?>
I can't stand all the <?lua ?> cruft. Instead, I use slslpp:
http://lua-users.org/wiki/SlightlyLessSimpleLuaPreprocessor
# for i = 1,10 do
<p>$(i)</p>
# end
Of course, this doesn't answer the OP's question. I think the answer
to that question is: if you want KidLanguage, you know where to find
it. ;)
Well... I actually have implemented my template library inspired on Kid.
I like Lua, like Kid but don't quite like XML, so...
-- sometemplate.lua
html{
head{
title{ "Hello, world" };
link{ rel = "stylesheet", src = "style.css" };
};
body{
div{ id = "header"; "Welcome to ${sitetitle}!" };
div{ _if = "session.logged"; id = "menu"; class = "sidemenu";
ul{
li{ _for = "i, section in ipairs( session.sections )";
a{ href = "${section.href}", "${section.title}" };
};
};
};
};
};
And it compiles (on the fly) another Lua script (for performance and
debugging reasons):
out("<html>")
out("<head>")
out("<title>")
out("Hello, world")
...
out("<div id=\"header\">")
out("Welcome to ")
out(sanitize(sitetitle))
out("!")
if (session.logged) then
out("<div id=\"menu\" class=\"sidemenu\">")
out("<ul>")
for i, section in ipairs( session.sections ) do
out("<li>")
out("<a href=\"")
out(section.href)
out("\">")
out(sanitize(section.title))
out("</a>")
out("</li>")
end
out("</ul>")
out("</div>")
end
...
out("</html>")
Of course, in real-world, I optimize those outputs to something like:
out("<html><head><title>Hello, World</title> ... <div
id=\"header\">Welcome to ", sanitize(sitetile), "!")
if (session.logged) then
out("<div id=\"menu\" class=\"sidemenu\"><ul>")
for i, section in ipairs( session.sections ) do
out("<li><a
href=\"",section.href,"\">",sanitize(section.title),"</a></li>")
end
out("</ul></div>")
end
out("...</body></html>")
I must say it is quite comfortable and fast. The only drawback is that
debug can get a bit boring, because the line numbers differs (the one in
which the expression was declared and the one which lies on the compiled
code)
--rb