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Strange, unexpected behavior (disappearing/changing values) when using Hash default value, e.g. Hash
... no possibility of hidden or subtle unexpected behavior. However, the most common and idiomatic way is “the mutable way”.
As a final aside, this behavior of Hash default values is noted in Ruby Koans.
† This isn’t strictly true, methods like instance_variable_set bypass this, but they mu...
OO Design in Rails: Where to put stuff
...hing from their controllers and throw it into the model, which starts to become a new trash can for application logic.
Skinny controllers are, in fact, a good idea, but the corollary--putting everything in the model, isn't really the best plan.
In Ruby, you have a couple of good options for making...
What is the Difference Between Mercurial and Git?
...Mercurial is James Bond)
The Differences Between Mercurial and Git
Edit: Comparing Git and Mercurial to celebrities seems to be a trend. Here's one more:
Git is Wesley Snipes, Mercurial is Denzel Washington
share
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Having both a Created and Last Updated timestamp columns in MySQL 4.0
... restriction has been lifted. Any TIMESTAMP column definition can have any combination of DEFAULT CURRENT_TIMESTAMP and ON UPDATE CURRENT_TIMESTAMP clauses. In addition, these clauses now can be used with DATETIME column definitions. For more information, see Automatic Initialization and Updating fo...
Why C# fails to compare two object types with each other but VB doesn't?
...C# and don't know if it's Boolean or any other type.
However when I try to compare those C# fails to give the right answer.
I have tried the same code with VB.NET and that did it !
...
How to empty a Heroku database
...tabase with your seed data:
$ heroku run rake db:seed
---OR---
You can combine the last two (migrate & seed) into one action by executing this:
$ heroku run rake db:setup
Edit 2014-04-18: rake db:setup doesn't work with Rails 4, it fails with a Couldn't create database error.
Edit 2014-1...
How to specify font attributes for all elements on an html web page?
...ly" (unless of course it's a webfont) - Arial,helvetica,sans-serif is more compatible.
– rob74
Apr 15 '15 at 18:14
...
Pass An Instantiated System.Type as a Type Parameter for a Generic Class
... this without reflection. However, you can do it with reflection. Here's a complete example:
using System;
using System.Reflection;
public class Generic<T>
{
public Generic()
{
Console.WriteLine("T={0}", typeof(T));
}
}
class Test
{
static void Main()
{
s...
Environment variable substitution in sed
If I run these commands from a script:
10 Answers
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how to get the host url using javascript from the current page
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