Skip to main content

· One min read

This is to help developers who encounter the error ERROR 1452 (23000) in MySQL resolve it.

There can be a few causes to this error. One of the reasons is the newline characters that terminate each line. There are differences between the Windows platform and the Linux-based platforms when terminating each line. Refer to this forum post for more information.

The other reason I found out personally is the existing data in the table. For example, suppose the field in the table was of type VARCHAR(20) and all rows have numeric strings in this field. Even if the field was modified to be an integer type, referencing this field to a numeric field in another table will not work because the data in the rows are character types. Therefore, before the foreign key constraint can be created, the data in the field has to be changed to integer types.

· 4 min read

Now that I've got my BlackBerry working fine, it's time to get it to work its magic. This, and the previous post, are made with my BB Bold.

A little bit of background on my Bold - I got it from M1, one of three telecom providers in Singapore. It comes with two flavours of BlackBerry plans: a S$30 plan with a data limit of 4 MB and a S$60 plan with unlimited data.

· One min read

Well, this is a test post from a BlackBerry - not sure if it will work.

Called up M1 a couple of days ago and changed the APN from mobilenet to sunsurf and performance has improved a lot. Trying to see if it works better with Wordpress.

· One min read

When doing some simple programming, I like to use the Vim editor instead of using a full-blown IDE. It's a good editor but I want to use it more efficiently. Some of the things I customise for myself are:

  • auto indentation - this is a must for programmers
  • tab size - to indent I use the tab key but different applications represent the tab character with different number of spaces; I like mine to be 4
  • I like my colours to be different

· 4 min read

I've finally got around to buying a new desktop for home use. Nothing fancy, but because I want the best bang for my buck, I've put off the purchase for quite sometime now. Being an IT guy, of course I chose to have my system assembled from the shops in Sim Lim Square instead of a PC vendor.

So, like any decent programmers/IT specialist will do, I analysed my requirements first. My needs are simple:

  1. It has to be at least dual core - I run VMware so nothing less than a dual core for me.
  2. It cannot be an overkill - I've seen too many instances where money is really put to waste. (Raise your hand if you've heard someone bought a quad-core processor to do word processing.)
  3. Plenty of hard disk space and running SATAII but must also support IDE drives,
  4. It must be supported by Linux and be able to run Compiz/Compiz Fusion.
  5. I prefer Gigabyte motherboard - been using it since my first desktop and never had any problems with it.

With my requirements listed carefully, I settled for Gigabyte motherboard GA-G31M-S2L, which has Intel GMA 3100, Realtek 8168B PCI-Express Gigabit Ethernet Controller, I specifically mentioned these two components because they have been my biggest worry if I were to use Linux.

· One min read

In openSUSE 10.3, there is no readily available solution (that I know of) that lets a user print to PDF. The closest thing there is to that is a PostScript (PS) file. Fortunately there is a easy way to convert PS files to PDF. There is a command called

ps2pdf which does exactly that. Its usage is very straightforward as well:
ps2pdf document.pdf

How much simpler can that get?

· One min read

Installing fonts has been somewhat of a neglect in Linux. Although I haven't checked, it seems that recent distributions of SUSE Linux has made it GUI-friendly.

Nevertheless, being a console guy, I believe it's better to know a more reliable way to make things work that is more 'portable' (i.e. work in other distributions as well).

So for fonts, the most straightforward way I know is to copy the font into your personal directory's hidden font folder e.g. /home/coder/.fonts

After having done that, the next step is to then make the font available to your applications. This can be done with the command:

fc-cache -fv

That's all there is to it!

· 2 min read

Ever since I've started listening to the Security Now podcast, I've grown a lot more security- and privacy- conscious (which is a good thing). From the podcast, I've learnt that one of the easiest thing you can do to protect yourself on the Internet is to disable cookies by default, and allow only those from domains that you trust to be stored on your computer.

Being a Firefox user, I disabled cookies by default and set up an exception list to allow only hosts that I trust. Over time, this list has grown quite a bit. For whatever reason if I lose this list (either through an upgrade or a different computer), it can be quite inconvenient to redo the list again. Fortunately, I've found a way to back up the list.

· One min read

In my previous post, I mentioned that I sometimes have trouble using the mksusebootdisk script make the thumb drive bootable. In a recent endeavour to install openSUSE 10.3 onto the Eee PC again, I encountered the same problem. This time though, I was in a rush for time and simply refused to do the whole process from formatting the file system (till this date I still have not figured out what is the cause of the problem).