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Difference between val() and text()
.... After that action the content in the textarea didnt change anymore. With setting content with .val('content') this problem didnt appear. Couldnt figure out why, but I think it has something to do with DOM cache-ing and different behaviour of these 2 methods.
– Erik Čerpnjak
...
Using Rails serialize to save hash to database
...add_column :users, :location_data, :hstore
end
end
With hstore you can set attributes on the serialized field
class User < ActiveRecord::Base
# setup hstore
store_accessor :location_data, :city, :state
end
sha...
A semantics for Bash scripts?
...$ 'echo' foo
foo
$ "echo" foo
foo
Substring expansion
$ fail='echoes'
$ set -x # So we can see what's going on
$ "${fail:0:-2}" Hello World
+ echo Hello World
Hello World
For more on expansions, read the Parameter Expansion section of the manual. It's quite powerful.
Integers and arithmetic ex...
Environment variables for java installation
How to set the environment variables for Java in Windows (the classpath)?
14 Answers
1...
C# 5 async CTP: why is internal “state” set to 0 in generated code before EndAwait call?
... matter. The point of this question was finding out why the state is being set at all.
The value is relevant if the await ends in an exception which is caught. We can end up coming back to the same await statement again, but we mustn't be in the state meaning "I'm just about to come back from that ...
What does Maven Update Project do in Eclipse?
...
It syncs the Eclipse project settings with that of the pom. If you for example change important plugin settings, such as the output java version, you will find that Eclipse will ask you to update the project and afterwards the configured Java runtime in ...
Canvas width and height in HTML5
...properties that correspond to the height="…" and width="…" attributes. Set them to numeric values in JavaScript code to resize your canvas. For example:
var canvas = document.getElementsByTagName('canvas')[0];
canvas.width = 800;
canvas.height = 600;
Note that this clears the canvas, though ...
What is the at sign (@) in a batch file and what does it do?
...ecessary to leave a space between the "@" and the command.
When "echo" is set to "off" it is not necessary to use "@" because setting "echo" to "off" causes this behavior to become automatic. "Echo" is usually set to "on" by default when the execution of a script begins. This is the reason "@echo o...
T-SQL stored procedure that accepts multiple Id values
...ID('tempdb..#tmpDept', 'U') IS NOT NULL
BEGIN
DROP TABLE #tmpDept
END
SET @DepartmentIDs=REPLACE(@DepartmentIDs,' ','')
CREATE TABLE #tmpDept (DeptID INT)
DECLARE @DeptID INT
IF IsNumeric(@DepartmentIDs)=1
BEGIN
SET @DeptID=@DepartmentIDs
INSERT INTO #tmpDept (DeptID) SELECT @DeptID
EN...
Why does Sql Server keep executing after raiserror when xact_abort is on?
...milar question:
Thank you for your feedback. By design, the XACT_ABORT set option does not impact the behavior of the RAISERROR statement. We will consider your feedback to modify this behavior for a future release of SQL Server.
Yes, this is a bit of an issue for some who hoped RAISERROR wit...