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Heroku/GoDaddy: send naked domain to www [closed]
...m) for an app may result in an error like this:
! mydomain.com is owned by another user
All applications for a given base domain must be owned by the same
Heroku account. The above error means that someone else has already
added a mydomain.com custom domain to one of their apps.
...
ASP.NET MVC - Attaching an entity of type 'MODELNAME' failed because another entity of the same type
...would throw exactly the same error.
The issue I encounter here was caused by function canUserAccessA() which loads the A entity before updating the state of object a. This was screwing up the tracked entity and it was changing state of a object to Detached.
The solution was to amend canUserAccessA...
What is dynamic programming? [closed]
...xample of the Fibonacci numbers: finding the n th Fibonacci number defined by
Fn = Fn-1 + Fn-2 and F0 = 0, F1 = 1
Recursion
The obvious way to do this is recursive:
def fibonacci(n):
if n == 0:
return 0
if n == 1:
return 1
return fibonacci(n - 1) + fibonacci(n - ...
Differences between Exception and Error
...
This slide showing Java's exception hierarchy by @georgios-gousios concisely explains the differences between Errors and Exceptions in Java.
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Check whether a path is valid in Python without creating a file at the path's target
...es.
Needlessly writing (...and then failing to reliable close or delete) 0-byte files.
Ignoring OS-specific errors differentiating between non-ignorable invalid pathnames and ignorable filesystem issues. Unsurprisingly, this is critical under Windows. (See below.)
Ignoring race conditions resulting ...
Routing with Multiple Parameters using ASP.NET MVC
...
Parameters are directly supported in MVC by simply adding parameters onto your action methods. Given an action like the following:
public ActionResult GetImages(string artistName, string apiKey)
MVC will auto-populate the parameters when given a URL like:
/Arti...
What does !important mean in CSS?
...ule!'
In normal use a rule defined in an external stylesheet is overruled by a style defined in the head of the document, which, in turn, is overruled by an in-line style within the element itself (assuming equal specificity of the selectors). Defining a rule with the !important 'attribute' (?) dis...
What are Scala context and view bounds?
... class pattern, a pattern of code that emulates the functionality provided by Haskell type classes, though in a more verbose manner.
While a view bound can be used with simple types (for example, A <% String), a context bound requires a parameterized type, such as Ordered[A] above, but unlike St...
How to put the legend out of the plot
...
You can make the legend text smaller by specifying set_size of FontProperties.
Resources:
Legend guide
matplotlib.legend
matplotlib.pyplot.legend
matplotlib.font_manager
set_size(self, size)
Valid font size are xx-small, x-small, small, medium, large, x-large,...
Rails migration for has_and_belongs_to_many join table
...ny table must match this format. I'm assuming the two models to be joined by has_and_belongs_to_many are already in the DB : apples and oranges:
create_table :apples_oranges, :id => false do |t|
t.references :apple, :null => false
t.references :orange, :null => false
end
# Adding the...