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Can table columns with a Foreign Key be NULL?
...affected (0.01 sec)
INSERT INTO child (id, parent_id) VALUES (2, 1);
-- ERROR 1452 (23000): Cannot add or update a child row: a foreign key
-- constraint fails (`t/child`, CONSTRAINT `child_ibfk_1` FOREIGN KEY
-- (`parent_id`) REFERENCES `parent` (`id`))
The first insert will pass because we i...
Difference between $.ajax() and $.get() and $.load()
...ect access to the XHR-object using this method. Slightly more fine-grained error-handling is also provided. Can therefore be more complicated and often unecessary, but sometimes very useful. You have to deal with the returned data yourself with a callback.
$.get() is just a shorthand for $.ajax() b...
Decreasing for loops in Python impossible?
... range(5,-1,-1). Although he could probably figure that out from trial and error.
– kojiro
Aug 26 '13 at 1:20
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Is MonoTouch now banned on the iPhone? [closed]
....
– Dan Rosenstark
Apr 20 '10 at 23:05
Go explore, I'm sticking with Apple. I've got 2 macs and a developer's license...
How to pause / sleep thread or process in Android?
I want to make a pause between two lines of code, Let me explain a bit:
12 Answers
12...
How can I properly handle 404 in ASP.NET MVC?
...from http://blogs.microsoft.co.il/blogs/shay/archive/2009/03/06/real-world-error-hadnling-in-asp-net-mvc-rc2.aspx and works in ASP.net MVC 1.0 as well
Here's how I handle http exceptions:
protected void Application_Error(object sender, EventArgs e)
{
Exception exception = Server.GetLastError()...
Correct approach to global logging in Golang
... to the rest of main. Note I have not come up with a graceful way to close errorlog...
package main
import (
"fmt"
"log"
"os"
)
var errorlog *os.File
var logger *log.Logger
func init() {
errorlog, err := os.OpenFile(logfile, os.O_RDWR|os.O_CREATE|os.O_APPEND, 0666)
if err !=...
Can someone explain the right way to use SBT?
...kKey[Unit]("Fetch meaning of life")
fooTask := {
import scalaj.http._ // error: cannot resolve symbol
val response = Http("http://example.com").asString
...
}
However this will error saying missing import scalaj.http._. How is this possible when we, right above, added scalaj-http to libraryD...
Run batch file as a Windows service
...art the service yourself
whitespace is required after =
I did encounter an error on service start that the service did not respond in a timely manner, but it was clear the service had run the .bat successfully. Haven't dug into this yet but this thread experienced the same thing and solved it using ...
What is the difference between Collections.emptyList() and Collections.EMPTY_LIST
In Java, we have Collections.emptyList() and Collections.EMPTY_LIST . Both have the same property:
4 Answers
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