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PostgreSQL create table if not exists
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This feature has been implemented in Postgres 9.1:
CREATE TABLE IF NOT EXISTS myschema.mytable (i integer);
For older versions, here is a function to work around it:
CREATE OR REPLACE FUNCTION create_mytable()
RETURNS void
LANGUAGE plpgsql AS
$func$
BEGIN
IF EXISTS (SELECT FROM ...
Check if table exists and if it doesn't exist, create it in SQL Server 2008
I am writing a Stored procedure in SQL Server 2008.
I need to check if a table exists in the database. If it doesn't then I need to create it.
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String literals: Where do they go?
...l arrange for the array to get initialized from the literal and you can modify the array.
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Status bar and navigation bar appear over my view's bounds in iOS 7
...xtendedLayout in iOS7 SDK. Please add the following code to achieve this,
if ([self respondsToSelector:@selector(edgesForExtendedLayout)])
self.edgesForExtendedLayout = UIRectEdgeNone;
You need to add the above in your -(void)viewDidLoad method.
iOS 7 brings several changes to how you...
Scala: join an iterable of strings
...String ?
theStrings.mkString(",")
A variant exists in which you can specify a prefix and suffix too.
See here for an implementation using foldLeft, which is much more verbose, but perhaps worth looking at for education's sake.
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Stateless and Stateful Enterprise Java Beans
...am going through the Java EE 6 tutorial and I am trying to understand the difference between stateless and stateful session beans. If stateless session beans do not retain their state in between method calls, why is my program acting the way it is?
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Avoiding memory leaks with Scalaz 7 zipWithIndex/group enumeratees
...tion for anyone who's stuck with the older iteratee API, but I recently verified that an equivalent test passes against the scalaz-stream API. This is a newer stream processing API that is intended to replace iteratee.
For completeness, here's the test code:
// create a stream containing `n` array...
Best way to obfuscate an e-mail address on a website?
...pointing out that the suggestion here was to use HTML entities, which are different than URL encoding. According to that study, using entities for the @ and periods was the second most effective method (the most effective were three methods tied for first that all resulted in 0 spam messages). It wo...
How can I use a DLL file from Python?
...d*, and so on) and can pass by value or reference. It can also return specific data types although my example doesn't do that (the HLL API returns values by modifying a variable passed by reference).
In terms of the specific example shown above, IBM's EHLLAPI is a fairly consistent interface.
A...
How to specify data attributes in razor, e.g., data-externalid=“23151” on @this.Html.CheckBoxFor(…)
With razor, I'm unable to specify values for data- attributes such as data-externalid="23521"
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