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Postgres - FATAL: database files are incompatible with server
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edited Feb 25 at 9:59
answered Dec 12 '18 at 14:58
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Getting an “ambiguous redirect” error
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Adding quotes around the variable seems to be a good way to deal with the "ambiguous redirect" message: You tend to get a better message when you've made a typing mistake -- and when the error is due to spaces in the filename, using quotes is the fix.
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Print an integer in binary format in Java
I have a number and I want to print it in binary. I don't want to do it by writing an algorithm, Is there any built-in function for that in Java?
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How do I select a random value from an enumeration?
Given an arbitrary enumeration in C#, how do I select a random value?
9 Answers
9
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What makes JNI calls slow?
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First, it's worth noting that by "slow," we're talking about something that can take tens of nanoseconds. For trivial native methods, in 2010 I measured calls at an average 40 ns on my Windows desktop, and 11 ns on my Mac desktop. U...
Coredata Error “data: ”
I try to pull out data from CoreData with the following code
2 Answers
2
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Find value in an array
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Using Array#select will give you an array of elements that meet the criteria. But if you're looking for a way of getting the element out of the array that meets your criteria, Enumerable#detect would be a better way to go:
array = [1,2,3]
found = array.select {|e| e == 3} #=> [3]
found = ar...
How can I get the client's IP address in ASP.NET MVC?
...answer is to use the HttpRequest.UserHostAddress property.
Example: From within a Controller:
using System;
using System.Web.Mvc;
namespace Mvc.Controllers
{
public class HomeController : ClientController
{
public ActionResult Index()
{
string ip = Request.User...
Should I be concerned about excess, non-running, Docker containers?
...e a Dockerfile, creates a container. If the container is no longer running it can still be seen with docker ps -a .
5 Answ...
SQL order string as number
...ay.
If you can't do that then cast your column value to an integer explicitly with
select col from yourtable
order by cast(col as unsigned)
or implicitly for instance with a mathematical operation which forces a conversion to number
select col from yourtable
order by col + 0
BTW MySQL conve...