Check if a Javascript function exists

1 Comment » by Jon Hibbins on 22 March 2009
Filed under: Code, Javascript, Quick Tips, Uncategorized

If you want to check if a Javascript function exists before you attempt to call it and get an error try:

if(typeof window.Function == ‘function’) {
// function exists
Function();
}

iPhone 3.0

No Comments » by Jon Hibbins on 17 March 2009
Filed under: Code, Objective-C, Platform, Software Development, iPhone

Apple has announced the iPhone 3.0 software update which includes an updated Software Development Kit (SDK) with over 1,000 completely new APIs.

Here are a few highlighted features:

  • Search your iPhone
  • Cut, copy, and paste
  • Send photos, contacts, audio files, and location via MMS*
  • Read and compose email and text messages in landscape

And yes, I am running it (I have an Apple Developer Account), and so far I found one bug (on safari re-highlighting the address bar can sometimes make the address disapear) and an un-announced fearure (the call history list is now much more verbose)

The Apple Wheel: Apple’s new keyboard-free laptop

No Comments » by Jon Hibbins on 12 February 2009
Filed under: OSX, Platform, Uncategorized

The Onion Network has a report on Apple’s new keyboardless laptop Madness!!!

SVN Port TCP Port is 3690

1 Comment » by Jon Hibbins on
Filed under: .NET, C#, Code, OSX, Platform, Quick Tips, Software Development, Unix/Linux, Windows

If you need to access SVN remotely, by default it runs on port TCP port 3690, so you need to make sure it is open in your firewall etc.

SQL Server Schema,Table,Function and Stored procedure Auditing

1 Comment » by Jon Hibbins on 17 December 2008
Filed under: Code, MSSQL2005, MSSQL2008, Objective-C, SQL Server, Software Development, TSQL, iPhone

If you like to know what’s changing on your SQL Server then the following code creates an audit table and the associated trigger for logging the changes

The Audit Object Table

CREATE TABLE [dbo].[AuditObjects](
 [EventID] [int] IDENTITY(1,1) NOT NULL
,[EventData] [xml] NULL
PRIMARY KEY CLUSTERED (
   [EventID] ASC
) WITH (IGNORE_DUP_KEY = OFF) ON [PRIMARY]
) ON [PRIMARY]

And the associated Trigger

CREATE TRIGGER [TriggerAuditObjects]
ON DATABASE
FOR DDL_DATABASE_LEVEL_EVENTS
AS
INSERT INTO [dbo].[AuditObjects](EventData)
SELECT EVENTDATA()
GO
ENABLE TRIGGER [TriggerAuditObjects] ON DATABASE

You can now use xpath queries to analyse the data

Search Stored Procedures

No Comments » by Jon Hibbins on 5 December 2008
Filed under: Code, Database, MSSQL2005, MSSQL2008, Objective-C, Quick Tips, SQL Server, TSQL, iPhone

Ever had the need to search stored procedures to find redundant tables or text that needs replacing or re-factoring ?

Here’s a script to help (Sorry for the cursor, I’m sad with myself for using it :-( )

– Search string
DECLARE @SearchString nvarchar(50)
SET @SearchString = ‘Search String’

– Required Declares
DECLARE @getdbname sysname
DECLARE @sqlstm nvarchar(1000)
DECLARE SeachCursor cursor FOR
– Get All The Names into the SeachCursor
SELECT ‘['+name+']‘ FROM [master].[dbo].[sysdatabases] ORDER BY name
OPEN SeachCursor
– Add the Search Pattern
SET @SearchString = ‘%’ + @SearchString + ‘%’
–Get the first Name
FETCH NEXT FROM SeachCursor INTO @getdbname
WHILE @@FETCH_STATUS=0
        BEGIN
        –set the statement to define the search condition, with variables
        SET @sqlstm = ‘
        SELECT [SP].[Specific_Catalog] AS [Database_Name], [SP].[Routine_Name] AS [Stored Procedure Name],[SP].[Routine_Definition] AS [Routine_Definition]
        FROM ‘+ @getdbname+‘.[Information_Schema].[Routines] AS [SP]
        WHERE PatIndex(’+””+@SearchString+””+‘, [Routine_Definition]) > 0′
        –Execute the Query
        EXEC (@sqlstm)
        FETCH NEXT FROM SeachCursor INTO @getdbname
        END
–Close the Cursor and Deallocate it from memory
CLOSE SeachCursor
DEALLOCATE SeachCursor

SQL 2008 Enable Changes To Tables

10 Comments » by Jon Hibbins on 8 October 2008
Filed under: Database, MSSQL2008, SQL Server, TSQL

If you get the error in the SQL 2008 Management Studio :

“Saving changes is not permitted. The changes you have made require the following tables to be dropped and re-created. You have either made changes to a table that can’t be re-created or enabled the option Prevent saving changes that require the table to be re-created.”

You can enable changes inside the Microsoft SQL Server Management Studio by going to ‘Tools|Options|Designers’ then unchecking the ‘Prevent saving changes that require table re-creation’ option

Autostart Zend Core on Ubuntu

No Comments » by Jon Hibbins on 18 September 2008
Filed under: MySQL, PHP, Platform, Unix/Linux

This is the 2nd time I have had to search for starting up Zend Core automatically on Ubuntu Workstation, so here is the answer:

First change the permissions of /etc/rc.local by opening a terminal window (Applications|Accessories|Terminal) and enter the following command:

sudo chmod 777 /etc/rc.local

Then open this file with the text editor (Applications|Accessories|Text Editor) and put the following text before the exit 0 command

cd /usr/local/Zend/Core/mysql && ./bin/safe_mysqld &
/usr/local/Zend/apache2/bin/apachectl start &

Zend Core, PHP and MySQL should now all start automaticaly at boot time.

TSQL Count Number Of Stored Procedures, Views, Tables or Functions

1 Comment » by Jon Hibbins on 4 September 2008
Filed under: Code, Database, MSSQL2005, MSSQL2008, SQL Server, Software Development, TSQL

You can use TSQL to Count Number Of Stored Procedures, Views, Tables or Functions in a Database by using the Database INFORMATION_SCHEMA view

/* Count Number Of Tables In A Database */
    SELECT COUNT(*) AS TABLE_COUNT FROM INFORMATION_SCHEMA.TABLES
    WHERE TABLE_TYPE=‘BASE TABLE’
    /* Count Number Of Views In A Database */
    SELECT COUNT(*) AS VIEW_COUNT FROM INFORMATION_SCHEMA.VIEWS
    /* Count Number Of Stored Procedures In A Database */
    SELECT COUNT(*) AS PROCEDURE_COUNT FROM INFORMATION_SCHEMA.ROUTINES WHERE ROUTINE_TYPE = ‘PROCEDURE’
    /* Count Number Of Functions In A Database */
    SELECT COUNT(*) AS FUNCTION_COUNT FROM INFORMATION_SCHEMA.ROUTINES WHERE ROUTINE_TYPE = ‘FUNCTION’

The same methodology can be used to query for information :

/* Select Table Information For A Database */
    SELECT * FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_TYPE=‘BASE TABLE’
    /* Select View Information For A Database */
    SELECT * FROM INFORMATION_SCHEMA.VIEWS
    /* Select Stored Procedure Information For A Database */
    SELECT * FROM INFORMATION_SCHEMA.ROUTINES WHERE ROUTINE_TYPE = ‘PROCEDURE’
    /* Select Function Information For A Database */
    SELECT * FROM INFORMATION_SCHEMA.ROUTINES WHERE ROUTINE_TYPE = ‘FUNCTION’

SQL Server - TSQL DISTINCT or GROUP BY?

1 Comment » by Jon Hibbins on 3 September 2008
Filed under: Code, Database, MSSQL2005, MSSQL2008, SQL Server, Software Development, TSQL

DISTINCT v GROUP BY

A DISTINCT and GROUP BY usually generate the same query plan, so performance should be very simular or the same, if you only need to remove the dulicates then DISTINCT is easier to understand in the query, if you have a more complex query it may be worth running both and studdying the execution plan to see if your specific example wins

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