seed

(This is really a newbie question about Rake & Rails & dependencies in general. Trying to wrap my head around how all this fits together) Basically, I want a Rake task that acts like seed.rb but is called separately. It adds test data for the development environment, while my seed.rb provides basic data for all environments. The script, family_seed.rb, uses FactoryGirl to generate some records. It looks like this: require File.expand_path('../../config/environment', __FILE__) require './spec/factories' Family.delete_all Member.delete_all zinsser = Factory.create(:family, :last_name=>'Zinsser',

I need to generate X random double numbers uniformly distributed between two intervals [a,b], where a and b are also double numbers. Those X numbers need to be generated inside of a class function, say myclass::doSomething(a,b) . The thing is that the intervals [a,b] passed to the doSomething(a,b) function change each time the doSomething(a,b) function is called by another class function, say doThat() . I would like a solution that allows me to: 1. Have an engine with a higher scope, ideally, it should be seeded only once per application run. 2. The X random double numbers generated inside of

My question and code is based on the Code First Entity Framework Unit Test Examples blog post. I am using SQL Compact 4.0 and as such my unit tests are running against the actual database using real data similar to what is being described in the blog post. I want to seed my production database with default values in some of the tables but when running my unit tests I want to add additional data and update some of the default values. I have created a custom Initializer class that seeds the database with the default values. For my unit tests I have created another custom Initializer that

I would like to reset random sequences by using different seed numbers. When running this test code: boost::mt19937 gener(1); boost::normal_distribution<> normal(0,1); boost::variate_generator<boost::mt19937&,boost::normal_distribution<> > rng(gener, normal); cout << rng() << endl; cout << rng() << endl; cout << rng() << endl; gener.seed(2); cout << rng() << endl; cout << rng() << endl; gener.seed(1); cout << rng() << endl; gener.seed(2); cout << rng() << endl; gener.seed(3); cout << rng() << endl; I get the following output: # seed(1) via constructor -2.971829031 1.706951063 -0.430498971 #

依赖注入 当A类需要依赖于B类，也就是说需要在A类中实例化B类的对象来使用时候，如果B类中的功能发生改变，也会导致A类中使用B类的地方也要跟着修改，导致A类与B类高耦合。这个时候解决方式是，A类应该去依赖B类的接口，把具体的类的实例化交给外部。 就拿我们业务中常用的通知模块来说。 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 <?php /** * 定义了一个消息类 * Class Message */ class Message{ public function seed() { return 'seed email' ; } } /* * 订单产生的时候 需要发送消息 */ class Order{ protected $messager = '' ; function __construct() { $this ->messager = new Message(); } public function seed_msg() { return $this ->messager->seed(); } } $Order = new Order(); $Order ->seed_msg(); 上面的代码是我们传统的写法。首先由个消息发送的类。然后在我们需要发送消息的地方