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3785 - Programming languages - what are the differences between them?
Comparing the programming languages ... the same program in 10 languages How do I add one to a variable? Some languages have a ++ operator, other languages allow you to use +=, others have an incr command, and in some you have to write a long(er) assignment statement. How do I set up a variable in ....

3784 - Steam train calls at Melksham - Pictures
To my knowledge, this morning was the first time in nearly 50 years that a steam train stopped at Melksham - Steam Dreams running an excursion from Westbury to Canterbury. Midweek seems an unlikely day of the week to attract custom - hardly "prime time" with many people who might wish to go at work ....

3783 - Load path, load and require in Ruby, and a change from 1.8 to 1.9
Ruby loads files through the require command from a list of directories held in the $: special variable, also known as $LOAD_PATH. Up to and including Ruby 1.8, this path list included . (the current directory) but from Ruby 1.9 it does not. Here's a sample program:   require "direct" ....

3782 - Standard methods available on all objects in Ruby
There are a lot of things I can do with any object in Ruby - there's a whole package deal of methods available to me by just defining and creating an object: irb(main):003:0> class Thing irb(main):004:1> end => nil irb(main):005:0> widget = Thing.new => #<Thing:0x98c1e74> irb(main):006:0> widget ....

3781 - Private, Protected, Public in Ruby. What about interfaces and abstract classes in Ruby?
There's no requirement for you to use the words "public", "private" and "protected" in Ruby - methods within classes that you write default to being public anyway. But you may wish to protect certain of your methods from being called directly by the users of your classes. So - what protection do ....

3780 - Ruby of Rails - cleanly displaying model data in the view
The display of data from our model has - thus far - been formatted in the Controller (when that really ought be in the view) and has been liable to fail to display properly if the data contains HTML special characters such as < and &. The solution to this is provided for you by rails - simply ....

3779 - Adding validation to form entries and sticky fields - Ruby on Rails
So far, we have implemented an MVC application under Ruby in Rails, and provided a rudimentary form to allow the user to add rows to the model. In this section, we show you the extra code needed to validate the data, and to echo it back out to the user within the form if it's incorrect. 1. In the m ....

3778 - Providing a form to allow the user to add data to the model - Ruby on Rails
So far, we have implemented a single model - view - controller application using Ruby on Rails, and displayed the data in several forms. How do we add new data? We need to provide an "add product" form, and code to handle that form when it's submitted. Building on the example so far, here's how: A ....

3777 - Multiple views in a single appication - sharing common parts of the template - Ruby on Rails
So far ... we have installed Rails, and written a simple application with a single model, controller and view. In this article, I'll show you how to add a second controller method, and view, while sharing much of the view template. The example takes the scenario of a database of products where yo ....

3776 - Some traps it's so easy to fall into in designing your web site
"Vegetarians' can obviously be catered for" ... obviously. Don't know why they bother to tell us ... "I hope they haven't paid a lot of money for this" says Lisa, pointing me at the web site of a hotel that's not in Melksham, but is "near" according to their definition. I hope they haven't - or tha ....

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