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AWS ssh access 'Permission denied (publickey)' issue [closed]
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Most EC2 Linux images I've used only have the root user created by default.
See also: http://www.youtube.com/watch?v=WBro0TEAd7g
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quick random row selection in Postgres
...random()*N) LIMIT 1;
Consider a table of 2 rows; random()*N generates 0 <= x < 2 and for example SELECT myid FROM mytable OFFSET 1.7 LIMIT 1; returns 0 rows because of implicit rounding to nearest int.
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How can I determine installed SQL Server instances and their versions?
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I like the command-line options, but I got mixed results when I tried them on my (non-networked) developer box; basically "sqlcmd -L" was the only one that worked, and only if the SQL Server Browser Service was running. Is that to be expected?
– Matt
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Is there a method that works like start fragment for result?
...s and each had their own activity that was called with startActivityForResult().
10 Answers
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Rails has_and_belongs_to_many migration
...ts the creation of a primary key):
Rails 3
class CreateRestaurantsUsers < ActiveRecord::Migration
def self.up
create_table :restaurants_users, :id => false do |t|
t.references :restaurant
t.references :user
end
add_index :restaurants_users, [:restaurant_id, :use...
Should sorting logic be placed in the model, the view, or the controller? [closed]
...longs in the model since it contains business rules and state data. Since altering the way the model data is sorted falls squarely into the "change the view's presentation of the model" category, the controller is responsible for "doing the sorting" by calling the model.changeSortedState() method.
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How to convert OutputStream to InputStream?
...utorial/tutorial.html
// create conversion
final OutputStreamToInputStream<Void> out = new OutputStreamToInputStream<Void>() {
@Override
protected Void doRead(final InputStream in) throws Exception {
LibraryClass2.processDataFromInputStream(in);
return null;...
Debug.Assert vs Exception Throwing
...t instead of throwing a plain exception. What I mean is, in .NET the default response to a failed assertion is to "stop the world" and display a message box to the user. Though this kind of behavior could be modified, I find it highly annoying and redundant
to do that, while I could instead, just t...
How do I change the default author and committer in the Eclipse Git plugin?
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Each developer should perform:
git config --global user.name "<name of user>"
git config --global user.email "<email of user>"
If you want to change the author of an existing commit, look here
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How do you usually Tag log entries? (android)
...dering, how code obfuscation tools will affect my class names and as a result the value of this constant?
– Gumbit
Oct 22 '12 at 10:49
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