seed

问题 I'm looking for a function that I can pass an array and a seed to in PHP and get back a "randomized" array. If I passed the same array and same seed again, I would get the same output. I've tried this code //sample array $test = array(1,2,3,4,5,6); //show the array print_r($test); //seed the random number generator mt_srand('123'); //generate a random number based on that echo mt_rand(); echo "\n"; //shuffle the array shuffle($test); //show the results print_r($test); But it does not seem to

问题 I'm attempting to use the new standard way of loading seed data in Rails 2.3.4+, the db:seed rake task. I'm loading constant data, which is required for my application to really function correctly. What's the best way to get the db:seed task to run before the tests, so the data is pre-populated? 回答1: The db:seed rake task primarily just loads the db/seeds.rb script. Therefore just execute that file to load the data. load "#{Rails.root}/db/seeds.rb" # or Rails.application.load_seed Where to

问题 The JavaScript Math.random() function returns a random value between 0 and 1, automatically seeded based on the current time (similar to Java I believe). However, I don't think there's any way to set you own seed for it. How can I make a random number generator that I can provide my own seed value for, so that I can have it produce a repeatable sequence of (pseudo)random numbers? 回答1: One option is http://davidbau.com/seedrandom which is a seedable RC4-based Math.random() drop-in replacement

问题 I have an entity that has an identity column. As part of the data-seed I want to use specific identifier values for the "standard data" in my system. I dont want disable identity. only i want to set IDENTITY_INSERT ON in migration seed. My code is: protected override void Seed(DelphyWCFTestService.Model.DataContext context) { context.Database.ExecuteSqlCommand("SET IDENTITY_INSERT [dbo].[Cities] On "); context.Cities.AddOrUpdate( p => p.CityId, new City { CityId = 1, Title = "Paris" } ); }

问题 I have a user registration page and will send the information to couple of admin users that one new user registered in the site. Now, I created the seed data with list of users (200+). So, It'll send the 200+ email to the respective admin users. Hence, I want to stop send the mail confirmation to admin users when creating new user. 回答1: For Devise, add user.skip_confirmation! before saving. user = User.new( :email => 'person@example.com', :password => 'password1', :password_confirmation =>

问题 (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

问题 Okay, so I'm doing some research on how random numbers are generated with the Math.random method. So far I learned that it starts with a "random" seed, and that seed is plugged into some complex equation to create a random number. If the seed is always the same, will the outcome always be the same? I heard that the seeds for Math.random are generated through the current time, is that correct? They must use the current time all the way down to the mili-seconds or something, because if you didn

问题 ) I have some cloudinary's photos and I would like to make a seed (in my rails app). I'm using Carrierwave. In my seed, I try to put the cloudinary's url image : Course.create! ({ photo: "fismpnq3zma80dc2ovjt.jpg" )} But it's don't work. What can I do ? If I ask by console : pry(main)> c = Course.first .... pry(main)> c.photo @cache_id=nil, @file=nil, @filename=nil, .... @model=#<Way:0x00007f80e7a3a9c0 photo:nil, .... @mounted_as=:photo, @versions=nil> 回答1: In order to use the create method,

问题 I'm using std::random_shuffle and srandom, and wonder if it's possible to constrain srandom()'s effect to local block of code. To be more precise, For a server application, I need to have different random seeds for different clients and keep using this pre-determined seed for random number generation per clients. Thank you 回答1: The routines you are looking for are srandom_r(3) and random_r(3) : http://www.kernel.org/doc/man-pages/online/pages/man3/random_r.3.html 来源： https://stackoverflow.com