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Where to put model data and behaviour? [tl; dr; Use Services]
...efully provide several functions:
Methods for interacting with a RESTful API and creating new objects
Establishing relationships between models
Validating data before persis
How can I rename a database column in a Ruby on Rails migration?
...
http://api.rubyonrails.org/classes/ActiveRecord/Migration.html
Under Available Transformations
rename_column(table_name, column_name, new_column_name):
Renames a column but keeps the type and content.
...
What is the purpose of using -pedantic in GCC/G++ compiler?
...so implement the ANSI standard, and, if you are careful in which libraries/api calls you use, under other operating systems/platforms.
The first one, turns off SPECIFIC features of GCC. (-ansi)
The second one, will complain about ANYTHING at all that does not adhere to the standard (not only specif...
Why does C++ not allow inherited friendship?
...his is undesirable as you basically render useless the concept of a public API.
Note: A child of Bar can access Foo by using Bar, just make the method in Bar protected. Then the child of Bar can access a Foo by calling through its parent class.
Is this what you want?
class A
{
int x;
frie...
Plurality in user messages
...Format and ChoiceFormat? See http://download.oracle.com/javase/1.4.2/docs/api/java/text/MessageFormat.html for more information.
MessageFormat form = new MessageFormat("The disk \"{1}\" contains {0}.");
form.applyPattern(
"There {0,choice,0#are no files|1#is one file|1<are {0,number,integer}...
What are the nuances of scope prototypal / prototypical inheritance in AngularJS?
The API Reference Scope page says:
3 Answers
3
...
When saving, how can you check if a field has changed?
... A model mixin that tracks model fields' values and provide some useful api
to know what fields have been changed.
"""
def __init__(self, *args, **kwargs):
super(ModelDiffMixin, self).__init__(*args, **kwargs)
self.__initial = self._dict
@property
def diff(se...
How to format numbers? [duplicate]
...
On browsers that support the ECMAScript® 2016 Internationalization API Specification (ECMA-402), you can use an Intl.NumberFormat instance:
var nf = Intl.NumberFormat();
var x = 42000000;
console.log(nf.format(x)); // 42,000,000 in many locales
// 42.000.000 in ma...
Vagrant stuck connection timeout retrying
...ile should look like more or less as below:
Vagrant.configure(VAGRANTFILE_API_VERSION) do |config|
config.ssh.username = "vagrant"
config.ssh.password = "vagrant"
config.vm.provider "virtualbox" do |vb|
vb.gui = true
end
end
In my case even if GUI was displayed I got black screen...
Why does Python code use len() function instead of a length method?
...t behave like the built-ins, enabling the expressive and highly consistent APIs we call "Pythonic".
By implementing special methods your objects can support iteration, overload infix operators, manage contexts in with blocks etc. You can think of the Data Model as a way of using the Python languag...