Coding Blog

Even if you do not use Linux, you can still roll your own Android firmware update on Windows. Click [here] to download mkimage for Windows.

After scriptcmd (previous blog post), the next to be called is the update.sh script. The script will setup the file system, data partition, cache partition, and user space. It will install BusyBox for you. height=22 pointX=30 pointY=100 SDCARD=/mnt/mmcblk0p1 string="Good luck!" echo $string gui-echo $pointX $pointY "$string" if [ -x /mnt/mmcblk0/script/update.sh ] ; then SDCARD=/mnt/mmcblk0 fi if [ -f ${SDCARD}/script/android_fs.tar ] ; then string="Updating file system..." echo $string gui-echo $pointX $pointY "$string" else string="--- File not found - script/android_fs.tar" echo $string gui-echo $pointX $pointY "$string" pointY=$(($pointY + $height + $height)) string="Failed updating file system!" echo $string gui-echo $pointX $pointY "$string" exit 0 fi # FILE SYSTEM SETUP pointY=$(($pointY + $height + $height)) string="Cleaning up file...

Here’s my script for updating the Android firmware. This script must contain the correct file header for your processor. setenv BMP_ADR 3c00000 fatload mmc 0 $(BMP_ADR) script/hint1_en.bmp setenv lcdparam 1,30000,8,800,480,48,40,40,3,29,13 setenv pwmparam 0,45,1040,1040 setenv LCDC_FB f900000 lcdinit logo show -1 0 textout 30 80 "Android update will start after 8 seconds..." ffff00 sleep 1 textout 30 80 "Android update will start after 7 seconds..." ffff00 sleep 1 textout 30 80 "Android update will start after 6 seconds..." ffff00 sleep 1 textout 30 80 "Android update will start after 5 seconds..." ffff00 sleep 1 textout 30 80 "Android update will start after 4 seconds..." ffff00 sleep 1 textout 30 80 "Android update will start after 3 seconds..." ffff00 sleep 1 textout 30 80 "Android update will start after 2 seconds..." ffff00 sleep 1 textout 30 80 "Android update will start after 1 second..." ffff...

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For folks who do not read the manual. If you encounter this error using JXplorer: [LDAP: error code 1 - 00000000: LdapErr: DSID-0C090627, comment: In order to perform this operation a successful bind must be completed on the connection., data 0, vece] Do not use your login name. Use your full name instead.

I have already forgotten these things. 1. Inner join versus outer join 2. Simple select statement for getting the max value of a column + another column 3. Definition of Object Oriented programming 4. Exact figure of the limitation of HTTP GET. 5. Differences between GET and POST. 6. The default method of an HTML form when submitted. I have made time to review them. Here they are. 1. Inner join will return matched results between two tables while outer join will return all regardless if there is a match or none between the two tables. Here’s a good article by Jeff Atwood, A Visual Explanation of SQL Joins . 2. Given a table Person with two columns, Name and Age. To get the eldest, SELECT Name, Age FROM Person WHERE Age = max(Age); 3. Object oriented programming is a programming paradigm that uses objects. These objects consist of fields, methods and their interaction. 4. 256 characters. 5. Given the size limit of GET, POST is used to overcome that. POST is used if ...

I came across with this expression, button.enabled = !!enable !! is just a double not . This is just obscure.

HTML5 has a bunch of cool APIs. In one of my previous posts, I have written a simple demonstration of the Web Storage JavaScript API. In this post I will be showing another demonstration, the Web SQL Database JavaScript API. What is so fascinating about these APIs is they are “crash-safe.” Now you can lessen the load of your web servers and perform SQL tasks like, sorting, joining, etc. on the client side. Click [here] for the demonstration.

Let us say you have a list and you want to remove items while iterating through it if a certain condition satisfies. for (Object object : listOfObjects) { if (isConditionSatisfied) { listOfObjects.remove(object); } } What is wrong with this code above? Try it and you will get this, Exception in thread "main" java.util.ConcurrentModificationException You might want to do this instead, Iterator<Object> iterator = listOfObjects.iterator(); while (iterator.hasNext()) { Object object = iterator.next(); if (isConditionSatisfied) { iterator.remove(); } } Have a nice day.

Here is a simple demonstration of HTML5’s Web Storage. The code is quite straightforward. One thing to experiment is after entering any string and hitting save, try closing the browser entirely and opening it again visiting the same page to see if the data persisted. Click [here] for the demonstration.

It has been a while since I have written something about Javascript. You need to copy and paste this to your browser’s address bar to see how it works. javascript:R=0; x1=.1; y1=.05; x2=.25; y2=.24; x3=1.6; y3=.24; x4=300; y4=200; x5=300; y5=200; DI=document.getElementsByTagName("a"); DIL=DI.length; function A(){for(i=0; i-DIL; i++){DIS=DI[ i ].style; DIS.position='absolute'; DIS.left=(Math.sin(R*x1+i*x2+x3)*x4+x5)+"px"; DIS.top= (Math.cos(R*y1+i*y2+y3)*y4+y5)+"px"}R++}setInterval('A()',50); void(0); Enjoy!

Which one is faster? a == null or null == a ? This is the method of the former. public static boolean firstNullCheck(Object a) { if (a == null) { return true; } return false; } and the method of the latter. public static boolean secondNullCheck(Object a) { if (null == a) { return true; } return false; } Here’s the disassembly of the former. public static boolean firstNullCheck(java.lang.Object); Code: 0: aload_0 1: ifnonnull 6 4: iconst_1 5: ireturn 6: iconst_0 7: ireturn and the disassembly of the latter. public static boolean secondNullCheck(java.lang.Object); Code: 0: aconst_null 1: aload_0 2: if_acmpne 7 5: iconst_1 6: ireturn 7: iconst_0 8: ireturn The former saves you a bytecode. Anyone who can explain further since I am not sure whether if_acmpne is faster than ifnonnull ?

If you do not want your search queries to be compromised, use Google SSL . However, there is one thing I discovered though, if you click on a cached link, it’s not encrypted, it goes back to HTTP from HTTPS making the protected search useless. Just be aware.

Why are daily meetings important? Yes I know what you are thinking, to check if the schedule is on target, to spot showstoppers, roadblocks and whatnots. But aside from those, there are things that make daily meetings rewarding. Let’s face it, some people (including me) find it hard oftentimes to achieve a certain level of focus at work especially when multitasking is inevitable. Meetings will remind us of our commitments infront of our peers. Since most of us will be ashamed of not making any progress, it will trigger ourselves to do something about it. In my opinion, having daily meetings typically before the shift starts will help a lot of peers suffering from bad habits - procrastination. It is one way of invigorating those who have not found their way out yet. “Keep each other in the zone, what are teammates for?”

A very simple party, KFC Bucket, 1 Black Forest Cake. Thank you God for another blessed year.