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How do you write a migration to rename an ActiveRecord model and its table in Rails?
...ble_name
end
end
I had to go and rename the model declaration file manually.
Edit:
In Rails 3.1 & 4, ActiveRecord::Migration::CommandRecorder knows how to reverse rename_table migrations, so you can do this:
class RenameOldTableToNewTable < ActiveRecord::Migration
def change
rena...
Android SDK manager won't open
So I installed the android sdk for Windows:
29 Answers
29
...
Switching to landscape mode in Android Emulator
...inux.
For Mac users, you only need to use the fn key if the setting "Use all F1, F2 etc. keys as function keys" (under System Preferences -> Keyboard) is checked.
left-ctrl+F11on Windows 7
It works fine in Windows 7 for android emulator to change the landscape orientation to portrait and vic...
Why is Everyone Choosing JSON Over XML for jQuery? [closed]
...ng over to JSON . Even Microsoft has integrated support for JSON. What is all the hype over JSON?
19 Answers
...
Default implementation for Object.GetHashCode()
...{
public class Object {
[MethodImpl(MethodImplOptions.InternalCall)]
internal static extern int InternalGetHashCode(object obj);
public virtual int GetHashCode() {
return InternalGetHashCode(this);
}
}
}
InternalGetHashCode is mapped to an Objec...
Significance of -pthread flag when compiling
...plied to both the compiling and linking stage while others don't use it at all and just pass -lpthread to the linking stage.
...
Array include any value from another array?
....include?(food) }
=> true
Benchmark script:
require "benchmark"
N = 1_000_000
puts "ruby version: #{RUBY_VERSION}"
CHEESES = %w(chedder stilton brie mozzarella feta haloumi).freeze
FOODS = %w(pizza feta foods bread biscuits yoghurt bacon).freeze
Benchmark.bm(15) do |b|
b.report("&, emp...
How to ignore certain files in Git
...
How to ignore new files
Globally
Add the path(s) to your file(s) which you would like to ignore to your .gitignore file (and commit them). These file entries will also apply to others checking out the repository.
Locally
Add the path(s) to your file(...
Fastest way to copy file in node.js
...
I used this method and all I got was a blank file on write. any ideas why? fs.createReadStream('./init/xxx.json').pipe(fs.createWriteStream('xxx.json'));
– Timmerz
Aug 20 '14 at 15:23
...
What's the best way to validate an XML file against an XSD file?
... JDK 6 uses SAX parser with a StreamSource. A JAXP implementation could legally use a DOM parser in this case, but there is no reason to. If you use a DOM parser explicitly for validation, you will definitely instantiate a DOM tree.
– McDowell
Jul 21 '12 at 14:...