More ECMA Awesomeness
I've been adding more tender loving javascript features to RKelly (my Javascript to Ruby converter). You can now call to_ruby on an RKelly object and get back your Javascript as Ruby. For example:
puts RKelly.process(<<END
function c() {
alert('asdfasdf');
}
var a = {};
foo['b'] = c;
END
).to_ruby
function c() {
alert('asdfasdf');
}
var a = {};
foo['b'] = c;
END
).to_ruby
And that will out put the following ruby code:
def c
alert("asdfasdf")
end
a = lambda do
s = OpenStruct.new
return s
end.call
class << foo
def b
alert("asdfasdf")
end
end
alert("asdfasdf")
end
a = lambda do
s = OpenStruct.new
return s
end.call
class << foo
def b
alert("asdfasdf")
end
end
Implicit object declaration is now supported too:
puts RKelly.process(<<END
var s = {
x: function () { alert("blh"); },
y: "foo"
};
END
).to_ruby
var s = {
x: function () { alert("blh"); },
y: "foo"
};
END
).to_ruby
Which will output this:
s = lambda do
s = OpenStruct.new
class << s
def x
alert("blh")
end
end
s["y"] = "foo"
return s
end.call
s = OpenStruct.new
class << s
def x
alert("blh")
end
end
s["y"] = "foo"
return s
end.call
One thing I've found while implementing RKelly is that javascript tends to pass around function pointers a lot. I will probably have to convert RKelly to declare lambdas for all functions instead of actual functions. The problem is that I'll need to get it so the lambdas will be executed in the context of the object, but I'm sure that will be pretty easy.
Posted by Aaron Patterson • Permalink • Leave your Comment »
David Parkinson says:
@Aaron:
I salute the great work you’re doing with rkelly. I downloaded a copy and was looking at using it in a Rails application. However, I noticed that there was no gem on RubyForge, and there was no *.gemspec within /trunk/. Any chance you can add either of these two things in the near future?
In addition, is there a way I can run it as is in my app? I tried moving it to /lib/ and then requiring it in environment.rb and that caused mongrel to choke:
[davies] ruby script/server -u
Exiting
/usr/lib/ruby/gems/1.8/gems/rails-2.0.2/lib/commands/servers/mongrel.rb:16: warning: already initialized constant OPTIONS
/usr/lib/ruby/gems/1.8/gems/rails-2.0.2/lib/commands/servers/mongrel.rb:19: undefined method
from /usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:32:in
gemoriginalrequire’
from /usr/local/lib/siteruby/1.8/rubygems/customrequire.rb:32:in
from /usr/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:496:in
require’new_constants_in’
from /usr/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/activesupport/dependencies.rb:342:in
from /usr/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:496:in
require’
ruby/1.8/rubygems/custom_require.rb:27:infrom /usr/lib/ruby/gems/1.8/gems/rails-2.0.2/lib/commands/server.rb:39
from /usr/local/lib/site
from /usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:27:in
require’
from script/server:3
[davies]
If you have any ideas, please email me back.
Saturday, 26 January 2008 @ 11:27pm