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Rails: Default sort order for a rails model?
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default_scope
This works for Rails 4+:
class Book < ActiveRecord::Base
default_scope { order(created_at: :desc) }
end
For Rails 2.3, 3, you need this instead:
default_scope order('created_at DESC')
For Rails 2.x:
default_scope :order =>...
Swift alert view with OK and Cancel: which button tapped?
...lert, animated: true, completion: nil)
As you can see the block handlers for the UIAlertAction handle the button presses. A great tutorial is here (although this tutorial is not written using swift):
http://hayageek.com/uialertcontroller-example-ios/
Swift 3 update:
let refreshAlert = UIAlertCo...
Difference between java.util.Random and java.security.SecureRandom
...s plenty more research that clearly shows that you should never use an LCG for security-critical purposes. This also means that your random numbers are predictable right now, something you don't want for session IDs and the like.
How to break a Linear Congruential Generator
The assumption that an ...
Non-static method requires a target
...h DBContext which will resolve all the Navigation Properties. If there are Foreign Key references (Navigation Properties) between tables and you use those references in your lambda (e.g. ProductDetail.Products.ID) then that "Products" context remains null if you manually created the Entity.
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Chrome/jQuery Uncaught RangeError: Maximum call stack size exceeded
...age" binding the click-event to every single cell will cause a terrible performance problem. There's a better way to do this, that is binding a click event to the body & then finding out if the cell element was the target of the click. Like this:
$('body').click(function(e){
var Elem = e...
Difference between applicationContext.xml and spring-servlet.xml in Spring Framework
...in a parent-child hierarchy.
The applicationContext.xml defines the beans for the "root webapp context", i.e. the context associated with the webapp.
The spring-servlet.xml (or whatever else you call it) defines the beans for one servlet's app context. There can be many of these in a webapp, one ...
Google Maps API v3: How do I dynamically change the marker icon?
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Call the marker.setIcon('newImage.png')... Look here for the docs.
Are you asking about the actual way to do it? You could just create each div, and a add a mouseover and mouseout listener that would change the icon and back for the markers.
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Add native files from NuGet package to project output directory
I'm trying to create NuGet package for a .Net assembly which does pinvoke to a native win32 dll.
I need to pack both the assembly and the native dll with the assembly added to the project references (no problem at this part) and the native dll should be copied into the project output directory or so...
Logical operator in a handlebars.js {{#if}} conditional
...the logicless nature since there's already IF, UNLESS, and EACH... so much for logicless
– Asaf
Sep 7 '15 at 20:01
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show 17 more comments
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Chrome Extension Message passing: response not sent
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From the documentation for chrome.runtime.onMessage.addListener:
This function becomes invalid when the event listener returns, unless you return true from the event listener to indicate you wish to send a response asynchronously (this will kee...