I need to read a file in MB chunks, is there a cleaner way to do this in Ruby: FILENAME="d:\\tmp\\file.bin" MEGABYTE = 1024*1024 size = File.size(FILENAME) open(FILENAME, "rb") do |io| read = 0 while read < size left = (size - read) cur = left < MEGABYTE ? left : MEGABYTE data = io.read(cur) read += data.size pu...
I'm calling a controller action to do a search with an AJAX request from 2 different pages and want to render a different rjs file based on which page requested the action. I could just make 2 actions to do this but it doesn't seem very DRY when it's the same code in the action just need different rjs as it's displaying the search result...
Hello. I have 2 model classes with different attributes: class User < ActiveRecord::Base end class Subuser < User end When I call the 'new' function within controller: def new @subuser = Subuser.new respond_to do |format| format.html # new.html.erb format.xml { render :xml => @hosting } end end and try to access da...
Working on trying to understand the syntax for calling on different values of a hash. For example lets say I am trying to delete 'pants' How do go about setting the argument for something like this: products = {124 => ['shoes', 59.99], 352 => ['shirt', 19.99], 777 => ['pants', 19.87], 667 => ['jacket', 39.99], 898 => ['shoulder_holster'...
I have a lot of APIs/Classes that I have developed in Ruby and Python that I would like to use in my .NET apps. Is it possible to instantiate a Ruby or Python Object in C# and call its methods? It seems that libraries like IronPython do the opposite of this. Meaning, they allow Python to utilize .NET objects, but not the reciprocal of t...
Hey. I have some xml on server (http://server.com/my.xml). Here is the example: <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE current PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <current> <song>Bruce - Inside The Machine</song> <song>02 Duel of the Fates 1</song> </current> ...
I'm working on a rails site that I've inherited and am trying to troubleshooting some sub-optimal model behavior. I have users, songs, and songs_download, each of which is its own model. Here's the relevant line from the users model: has_and_belongs_to_many :downloaded_songs, :class_name => 'Song', :join_table => :song_downloads F...
I'm confused about the world of Ruby Gems. There are several well-known repositories. Which is the right one, or does it matter? I guess Gemcutter is the hip repository right now. They definitely have the nicest-looking website. Does that mean I should get my gems from there? The main reason I'm asking is that I want to make sure I'm g...
Suppose you had this: def wipeProduct(hash, nameToDelete) hash.each do |i| key = i[0] productName = i[1].first hash.delete(key) if productName==nameToDelete end end I'm not sure it's safe to delete things from a hash whilst you're iterating over the key-value pairs of the hash. I checked the RI documentation but I ha...
I have a structure of simple container classes like so (in pseudo ruby): class A attr_reader :string_field1, :string_field2 ... end class B attr_reader: int_field3, :string_field4 ... end # C includes an instance of A and B class C attr_reader: :a_instance, :b_instance ... end Is there are simple way to de/serialize this...
How do you apply an external stylesheet to a textile document with Ruby's Redcloth, so that I can convert it to HTML and it will apply the styles? I understand how to apply styles individually to parts of text, but how to I define a whole style (say text with font-size 20, color red, alignment x, font-family y, etc.), and apply it to al...
Trying to get a value out of 2d array inside of a hash and determine its max or min value This is what I have so far pretend_hash = { 333 => [Dog,19.99], 222=> [Cat,25.55] } if a == 5 # Loop for view highest priced product" puts "View highest priced product" puts pretend_hash.values.max end So this returns the...
A function takes a string as argument, example fn("string"). i want to pass in different values depending on three of more condiitons, and one approach which is slightly unreadable is: fn(check_1 ? "yes" : check_2 ? "no" : "maybe") i want to replace the argument with a block that returns a string. i am hoping i can do something like: ...
I would like to automate the creation of symbolic links on my laptops from a simple Rails app running on a remote server. I would need to be able to run kernel tasks on the laptop from anywhere. Is this even possible to do? ...
I checked out the latest Ruby version, to play a bit with the latest changes. The first thing I tried to do was call a Ruby lambda/block/proc just like you'd do with a Python callable. a = lambda {|x| puts x} a.call(4) # works, and prints 4 a[4] # works and prints 4 a.(4) # same a(4) # undefined method 'a' for main:Object Why isn't th...
Hi how to build a named_scope which will be common for all models. ...
Hi, Are there any wiki syntax like rdoc, markdown, ... recommended in the ruby world? I write sometimes open source code and have no glue which syntax I should use in Code documents and in README files. What be helpful for me which and why you use it. ...
For the sake of convenience I am trying to assign multiple values to a hash key in Ruby. Here's the code so far myhash = { :name => ["Tom" , "Dick" , "Harry"] } Looping through the hash gives a concatenated string of the 3 values **Output** name : TomDickHarry **Required Output** :name => "Tom" , :name => "Dick" , :name => "Harry" ...
If someone uploads an image via a form, how do you save the image in public/images and not in a model? And I do NOT want to use plugins. ...
I'm aware of dnssd, being a Ruby library for Apple's Bonjour protocol for network discovery for Mac OS X only, but is there a (relatively recent/complete) library that is cross platform? ...