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Create a new Ruby on Rails application using MySQL instead of SQLite
...lready have a rails project, change the adapter in the config/database.yml file to mysql and make sure you specify a valid username and password, and optionally, a socket:
development:
adapter: mysql2
database: db_name_dev
username: koploper
password:
host: localhost
socket: /tmp/mysql....
Hadoop “Unable to load native-hadoop library for your platform” warning
...ere applicable
So, off to here to see what it does:
http://grepcode.com/file/repo1.maven.org/maven2/com.ning/metrics.action/0.2.6/org/apache/hadoop/util/NativeCodeLoader.java/
Ah, there is some debug level logging - let's turn that on a see if we get some additional help. This is done by adding ...
How can I see the SQL that will be generated by a given ActiveRecord query in Ruby on Rails
...ion statement just by putting ".to_sql" at the end. This question also provides that answer: stackoverflow.com/questions/3814738/…
– Steve Midgley
Sep 17 '14 at 5:03
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Is is possible to check if an object is already attached to a data context in Entity Framework?
...
Here's what I ended up with, which works very nicely:
public static void AttachToOrGet<T>(this ObjectContext context, string entitySetName, ref T entity)
where T : IEntityWithKey
{
ObjectStateEntry entry;
// Track whether we need to perform an attach
bool attach = false;
...
REST API Authentication
...fer following on how to implement:
Working Link from comments: https://www.ida.liu.se/~TDP024/labs/hmacarticle.pdf
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SQLiteDatabase.query method
... null, null, orderBy);
// since we have a named column we can do
int idx = c.getColumnIndex("max");
is equivalent to the following raw query
String queryString =
"SELECT column1, (SELECT max(column1) FROM table1) AS max FROM table1 " +
"WHERE column1 = ? OR column1 = ? ORDER BY colu...
cartesian product in pandas
...e cartesian product on.
My use case was that I needed a list of all store IDs on for each week in my list. So, I created a list of all the weeks I wanted to have, then a list of all the store IDs I wanted to map them against.
The merge I chose left, but would be semantically the same as inner in t...
What are the differences between “git commit” and “git push”?
...
@Piet it starts at your workspace, where you modify files. Then you add them to the index, commit them to the local repository and - finally - push them to the remote repository
– tanascius
Apr 3 '14 at 8:11
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Multiple commands on same line
...lems if you use | after them
| does not work consistently in configuration files, see :help map_bar
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Kill child process when parent process is killed
...bjects" http://msdn.microsoft.com/en-us/library/ms682409(VS.85).aspx.
The idea is to create a "job object" for your main application, and register your child processes with the job object. If the main process dies, the OS will take care of terminating the child processes.
public enum JobObjectInfo...