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What does inverse_of do? What SQL does it generate?
...lt; ActiveRecord::Base
has_many :traps, :inverse_of => :dungeon
has_one :evil_wizard, :inverse_of => :dungeon
end
class Trap < ActiveRecord::Base
belongs_to :dungeon, :inverse_of => :traps
end
class EvilWizard < ActiveRecord::Base
belongs_to :dungeon, :inverse_of => :evil...
Spring Test & Security: How to mock authentication?
...st if my the URLs of my controllers are properly secured. Just in case someone changes things around and accidentally removes security settings.
...
How do you deal with configuration files in source control?
...e configuration.whatever. Every developer working on the project will have one version for their dev boxes, there will be a dev, prod and stage versions. How do you deal with this in source control? Not check in this file at all, check it with different names or do something fancy altogether?
...
How to identify unused css definitions
... from the description, you have to provide the path of your html files and one CSS file. The program will then list the unused CSS selectors. From the screenshot, it looks like there is no way to export this list or download a new clean CSS file. It also looks like the service is limited to one CSS ...
Bash array with spaces in elements
...apes:
for ((i = 0; i < ${#FILES[@]}; i++))
do
echo "${FILES[$i]}"
done
Any of these declarations of $FILES should work:
FILES=(2011-09-04\ 21.43.02.jpg
2011-09-05\ 10.23.14.jpg
2011-09-09\ 12.31.16.jpg
2011-09-11\ 08.43.12.jpg)
or
FILES=("2011-09-04 21.43.02.jpg"
"2011-09-05 10.23.14.j...
LEFT JOIN only first row
...t way. I always tried to join both on the same level instead of making the one depended from the other. Thank you very much for leading me on the right track. Edited the first post
– KddC
Mar 25 '13 at 23:39
...
Diagnosing Memory Leaks - Allowed memory size of # bytes exhausted
...
I noticed one time in an old script that PHP would maintain the "as" variable as in scope even after my foreach loop. For example,
foreach($users as $user){
$user->doSomething();
}
var_dump($user); // would output the data from t...
Iterating through a range of dates in Python
...Right now I think it's better than nested loops, but it starts to get Perl-one-linerish when you have a generator in a list comprehension.
...
MySQL: Quick breakdown of the types of joins [duplicate]
...planation of the join type
JOIN: Return rows when there is at least one match in both tables
LEFT JOIN: Return all rows from the left table, even if there are no matches in the right table
RIGHT JOIN: Return all rows from the right table, even if there are no matches in the left table
F...
Converting a Java collection into a Scala collection
...
For future reference: With Scala 2.8, it could be done like this:
import scala.collection.JavaConversions._
val list = new java.util.ArrayList[String]()
list.add("test")
val set = list.toSet
set is a scala.collection.immutable.Set[String] after this.
Also see Ben James' a...