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Randomize a List
...uffle();
The code above uses the much criticised System.Random method to select swap candidates. It's fast but not as random as it should be. If you need a better quality of randomness in your shuffles use the random number generator in System.Security.Cryptography like so:
using System.Security....
EC2 Instance Cloning
...he easier way is through the web management console:
go to the instance
select the instance and click on instance action
create image
Once you have an image you can launch another cloned instance, data and all. :)
shar...
Storing Data in MySQL as JSON
... statement, including WHERE, ORDER BY, and GROUP BY clauses. This includes SELECT, UPDATE, DELETE, CREATE TABLE, and other SQL statements. The left hand side must be a JSON column identifier (and not an alias). The right hand side is a quoted JSON path expression which is evaluated against the JSON ...
How can I access the MySQL command line with XAMPP for Windows?
... The buffer size for TCP/IP and socket communication.
--select-limit=# Automatic limit for SELECT when using --safe-updates.
--max-join-size=# Automatic limit for rows in a join when using
--safe-updates.
--secure-auth Refuse client connecting ...
The provider is not compatible with the version of Oracle client
... or 64-bit Oracle Data Access Components (ODAC) Downloads) or you have to select according option in Oracle Universal Installer (OUI).
Note, when installing the Oracle Data Provider >= 12.1, then the provider is not automatically registered into GAC. You have to register it manually if needed,...
How to generate the JPA entity Metamodel?
...EE Developers") has its own metamodel generator integrated with Eclipse.
Select your project in the Package Explorer
Go to Properties -> JPA dialog
Select source folder from Canonical metamodel (JPA 2.0) group
Click Apply button to generate metamodel classes in the selected source folder
Th...
How to make rounded percentages add up to 100%
...original,
decimal forceSum, int decimals)
{
var rounded = original.Select(x => Math.Round(x, decimals)).ToList();
Debug.Assert(Math.Round(forceSum, decimals) == forceSum);
var delta = forceSum - rounded.Sum();
if (delta == 0) return rounded;
var deltaUnit = Convert.ToDecim...
Regex group capture in R with multiple capture-groups
...he capture group:
However, in order for this to work, you must explicitly select elements outside your capture group as mentioned in the gsub() help.
(...) elements of character vectors 'x' which are not substituted will be returned unchanged.
So if your text to be selected lies in the mi...
Is there “Break on Exception” in IntelliJ?
...reakpoints tab. If that was the last tab you were viewing, it'll still be selected, making it easy to flick breaking on exceptions on and off.
This will cause IntelliJ to break at the point in the code (or library code) where the exception was raised. Specifically, you get a 'first chance' at exc...
What is the best way to force yourself to master vi? [closed]
...enefits of Vim is the speed it allows you. The arrow keys also prevent you from really embracing the modal nature, which is very powerful when mastered.
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