seed

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How to seed data when using Model First approach?

So I am learning MVC3 and EF4. I tried the code first method but it was too confusing for me.. I can create the classes no problem, but the hard part comes when dealing with foreign keys and the rela[详细]

2023-03-06 12:03 分类：问答
Reset Mersenne Twister

I assumed the answer to this is simple but at the moment it seems to be completely alluding me. I\'m using Mersenne Twister (implementation here http://www.bedaux.net/mtrand/) for generating random n[详细]

2023-03-01 16:34 分类：问答
Best practice when using seed.rb

I\'m having some difficulties understanding how to use the seed.rb script in rails. So far, I\'ve used it to populate my database every time i deploy my application.[详细]

2023-02-26 21:18 分类：问答
How do you create pseudo random numbers sequentially in c/c++?

srand(time(NULL)); for (it=hand.begin(); it < hand.end(); it++) (*it) = rand() % 13 + 1; This code does not work to create many random numbers at a time.[详细]

2023-02-26 06:38 分类：问答
Monte carlo on GPU

Today I had a talk with a friend of mine told me he tries to make some monte carlo simulations using GPU. What was interesting he told me that he wanted to draw numbers randomly on different processor[详细]

2023-02-22 11:59 分类：问答
Rails: Make this rake task aware that it is in the test environment

I have the following rake task defined in my lib/tasks folder: namespace :db do namespace :test do task :prepare => :environment do[详细]

2023-02-21 09:28 分类：问答
Unable to Seed Data for Authlogic

When I run rake db:seed in my Rails 3 application I get the error: rake aborted! undefined method \'find_or_create_by_first_name_and_last_name_and_role_and_email_and_password_and_password_confirmatio[详细]

2023-02-21 05:32 分类：问答
Using rake db:seed with file uploads

I have an app t开发者_如何学Gohat uses Paperclip, and I am also using rake db:seed to generate some demo accounts that can be used to help bring in new users.[详细]

2023-02-20 23:18 分类：问答
How can I use FactoryBot in db/seeds?

Is it possible 开发者_如何转开发to do this? If so, how can you do it? Note: FactoryBot was previously named FactoryGirlAll you need to do is add require \'factory_bot_rails\' to the db/seeds.rb file[详细]

2023-02-18 00:43 分类：问答
What's the benefit of seeding a random number generator with only prime numbers?

While conducting some experiments in Java, my project supervisor reminded me to seed each iteration of the experiment with a different number. He also mentioned that I should use prime numbers for the[详细]

2023-02-17 19:27 分类：问答