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How do I handle too long index names in a Ruby on Rails ActiveRecord migration?
...
Provide the :name option to add_index, e.g.:
add_index :studies,
["user_id", "university_id", "subject_name_id", "subject_type_id"],
:unique => true,
:name => 'my_index'
If using the :index option on references in a create_table block, it t...
How to detect the OS from a Bash script?
... and .bash_login files in version control so that I can use them between all the computers I use. The problem is I have some OS specific aliases so I was looking for a way to determine if the script is running on Mac OS X, Linux or Cygwin .
...
Using fonts with Rails asset pipeline
...path(...). This helper does exactly the same thing but it's more clear.
Finally, use your font in your CSS like you declared it in the font-family part. If it was declared capitalized, you can use it like this:
font-family: 'Icomoon';
...
服务器保持大量TIME_WAIT和CLOSE_WAIT的解决方法 - C/C++ - 清泛网 - 专注C/C++及内核技术
服务器保持大量TIME_WAIT和CLOSE_WAIT的解决方法昨天解决了一个HttpClient调用错误导致的服务器异常，具体过程如下：http: blog.csdn.net shootyou article details 6615051里头的分析过...昨天解决了一个HttpClient调用错误导致的服务器异常，具体...
How to Generate unique file names in C#
...e:
public string GenerateFileName(string context)
{
return context + "_" + DateTime.Now.ToString("yyyyMMddHHmmssfff") + "_" + Guid.NewGuid().ToString("N");
}
filename1 = GenerateFileName("MeasurementData");
filename2 = GenerateFileName("Image");
This way, when I sort by filename, it will aut...
How to run `rails generate scaffold` when the model already exists?
... using the rails generate option. If you run rails generate -h you can see all of the options available to you.
Rails:
controller
generator
helper
integration_test
mailer
migration
model
observer
performance_test
plugin
resource
scaffold
scaffold_controller
session_migra...
How to log out user from web site using BASIC authentication?
...designed to manage logging out. You can do it, but not completely automatically.
What you have to do is have the user click a logout link, and send a ‘401 Unauthorized’ in response, using the same realm and at the same URL folder level as the normal 401 you send requesting a login.
They must b...
How to make a .jar out from an Android Studio project
...Jar.dependsOn(deleteJar, build)
Expand gradle panel from right and open all tasks under yourlibrary->others. You will see two new tasks there -- createJar and deleteJar
Double click on createJar
Once the task run successfully, get your generated jar from path mentioned in createJar task i.e....
Is it possible to make anonymous inner classes in Java static?
... a reference to the pointer of the containing instance (they are also not called inner classes anymore, they are called nested classes).
...
Cannot read configuration file due to insufficient permissions
... is same as above, but a little longer and simpler and improved.
First of all: you don't have to change anything in your config file. It's OK. The problem is with windows file permissions.
This problems occurs because your application can not access and read web.config file.
Make the file accessi...