Ruby: looking for ruby-embeddable interpreter or scripting language [closed] - ruby-on-rails

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In response to a previous question, #Pablo Fernandez suggested I implement a simple interpreter using Treetop to embed in my RoR application. It looks like a good approach.
But I can't help but wonder: hasn't anyone written a toy interpreter to embed in a Ruby app? I don't need any I/O functions -- in fact, I specifically don't want any I/O functions. (If you're wondering why I want an interpreter inside of Ruby, please refer to the original post!)
Thanks.

FWIW, I ended up tweaking a version of stickup to use as a embeddable interpreter. The process was fast and easy and serves my needs well. (And besides, I used to work for a Common Lisp company, so it was an excuse to re-live the joys of s-expressions.)

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How to create a user/event tracking tool, backed by Ruby on Rails [closed]

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are there any good references to start looking into building a simple but efficient tracking/event tool? Super simple version of a tool like Google Analytics. I am assuming this consist of two separate applications. One for the front-end which gets embedded into the client's website, and a back-end API to handle the events, queue, etc.
Preferred tools for the back-end for me is Rails.
I appreciate the help.
You'd be reinventing the wheel, but you'll need a javascript library to track the user and a rails API. Pretty much what you seem to know you need.
Here's the documentation on building a rails API: https://guides.rubyonrails.org/api_app.html
Refer to the top answer here for the javascript module: User Activity Tracking or Logging with javascript

Does Ruby have a gem for analyzing sentences? [closed]

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What I want is to be able to parse a sentence and classify the words in it as a noun,verb,adjective...etc
I'm aware of Ruby Wordnet and a few other similar projects, but I want something that's a lot simpler to use. Also, I'm open to any suggestions on how I could accomplish this without even requiring a gem.
I recently used engtagger to accomplish what you're describing. It's a pure Ruby gem, so it has no dependencies, but it is pretty old and has some quirks. Still, it was fast enough and accurate enough for my purposes.
As for doing part-of-speech tagging without a gem... it turns out that it's more complicated than you might think. You could implement a Brill tagging algorithm on your own, but that's probably not the best use of your time.

LUA in software testing (automation tests) [closed]

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Does someone know to to attach Lua scripts in Jmeter or Junit?!
Can someone recommend some tutorials or books with Lua software testing?!
What do you think about Lua this is good scripting language and useful on market or this is garbage?!
You embed Lua in your Java application with a library like LuaJ and work with Lua states there. Your JUnit tests simply wrap Java code which uses Lua.
LuaUnit and busted are well-documented frameworks for testing in Lua.
Lua is used in very popular, big games, like WoW, Garry's Mod, Starbound, GTA V and many more. It's one of the first choices for embedded systems and slowly finds his way into web development. All this because it's a very tiny and fast language and the only reason it's not more popular is the lack of libraries and documentations.

Public CLSI servers [closed]

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Does anyone know any publicly accessible CLSI (Common LaTeX Service Interface) servers other than ScribTeX? (nothing wrong with ScribTeX, in fact it's great, but I was wondering if there are any alternatives)
EDIT: I'm not looking for online LaTeX equation editors or proprietary APIs (e.g. MonkeyTex), I'm asking specifically about CLSI because it seems to be the standard for server-side LaTeX compilation.
I don't know if it's a CLSI, but there is LaTeXLab, built on google's app engine. http://code.google.com/p/latex-lab/
I know it's a little bit old question but you can use
https://github.com/overleaf/clsi
From the overleaf project
Not sure it's a CLSI server but http://rogercortesi.com/eqn/ is very nice and can probably be scripted, eg. http://rogercortesi.com/eqn/index.php?filename=&latextext=%5Czeta%282%29%3D%5Cpi%5E2%2F6&outtype=png&bgcolor=white&txcolor=black&res=150&antialias=1

Looking for simple poll/survey Rails plugin or gem [closed]

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I am trying to find a simple poll plugin/gem (the type of single question poll that's usually found in site's sidebar). All plugins that I've found are either too complex (like having their own DSL) or they are out of date (i.e. older than couple years).
Does anyone knows a Rails plugin/gem that handles simple polls?
Have you tried SMeRF, I'm currently using Surveyor and yes it is complicated. So I recommend you to use SMeRF, it is a lot more simple. But I can't seem to make it work on Rails3. xP
What version of Rails are you using?
I ended up writing my own custom solution for a simple poll I needed. Unfortunately, I needed it fast so I wrote it within an app I was working on (i.e. I didn't separate it into gem)

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