ImageMagick is built on Ghostscript which i have introduced in the following post previously.
Ghostscript – Convert PDF Cover/Page into PNG
I am working on my Rails project with the Paperclip gem which requires ImageMagick. Installation of ImageMagick in Ubuntu is very simple. Just grab it by apt-get. Continue reading ImageMagick – Manipulate Image Files by Shell Commands
I want to convert the cover page of a PDF into an image. so far, i have heard about 2 image processing tools in Linux. They are
Continue reading Ghostscript – Convert PDF Cover/Page into PNG
Export a database which is called Test:
mysqldump -u <username> -p Test > Test.sql
The sql file will be generated after you input the password. Continue reading MySQL – Import and Export Database with mysqldump
I have created so many testing orders in the Ubercart during the development. So before i migrate the site to production, i have to clear all the testing orders. This could be done by deleting the order one by one through the View orders page.
But i got more than 100 testing orders and obviously the above method is not clever enough. Continue reading Drupal – Delete all orders in Ubercart
Few people are capable of expressing with equanimity opinions which differ from the prejudices of their social environment. Most people are even incapable of forming such opinions.
Albert Einstein
記得多年前領匯上市，公屋居民盧少蘭婆婆，在時任立法會議員的鄭經翰等協助下，提出司法覆核，阻止房屋署賤賣政府資產。事件引起軒然大波，建制名嘴口誅筆伐，建制媒體指摘盧婆婆受政客操控，妨礙政府施政，指鄭經翰等人包攬訴訟，應予制裁，小投資者更是群情洶湧，集會抗議，指鄭經翰「阻人發達」，恐嚇要用暴力手段對付他。
事件至今已近七年，領匯搞得天怒人怨，瘋狂加租趕盡殺絕，迫使小商戶流血結業。商場千人一面，餸菜日用等必需品不停加價，收入微薄的屋邨居民百上加斤。昔日舉手贊成領匯上市，對盧少蘭鄭經翰破口大罵的建制直選議員，川劇變臉爐火純青，今天轉個頭來，為了選票，又擺出一副同情相，甚至為商戶出頭，組織遊行，抗議領匯加租。 Continue reading 吳志森 – 自閹了，還要閹別人
討論可以啟發思考，驗證自己的論點，從而找出更好的觀點好讓自己面對抉擇時作出恰當的決定。
古希臘文化的偉大，有賴於蘇格拉底式的討論，不單止孕育新思維、新思想，更引導人類判別善與惡，深深影響整個文化的各個階層，並伸展到歐洲不同地方。要注意的是這裡的善與惡不是單單的善良與邪惡，善代表所有有益、好的東西，惡是指有害、不好的。我在這裡所講的討論是善惡的討論，也就是古希臘先哲所討論的對象。
討論可以很容易發生，但有結果的討論卻不常見。這是因為不是有兩把口，會發聲就可以討論。
討論完各持己見的例子比比皆是，寫這篇Blog是為了提醒自己留意討論時的技巧，亦希望有興趣的朋友可以參考一下。 Continue reading 討論的技巧 @ 1
One day, i found the the Drupal cron job failed to run. There was no error log and after i clicked the run cron manually in the status report, it was redirected to a specific node. This redirection was previously added by me in hook_nodeapi() such that under certain conditions, that specific node is displayed. Continue reading Drupal – Cron problem with drupal_goto() in hook_nodeapi()
Special characters in URL are encoded according to RFC 3986. You could get the encoded URL by rawurlencode(). Continue reading PHP – URL Encode and Decode
Eureka! 