在Windows上讀取UNIX硬碟

http://blog.yam.com/lijohnson/article/12413235

Impala

Google Dremel 原理.
Impala 介绍

lftp upload directory

Upload all files and sub folders using lftp in command line

重心

http://www3.cnsh.mlc.edu.tw/~math/new/gravity.pdf

dbscan Gravity Center
Calculate Center of Gravity

實體中心
加權重心

使用JS產生色票

Create Web Safe Color palette using JavaScript

Create Simple Random Color Generator using JavaScript

Hive Left Join

http://myeyeofjava.iteye.com/blog/1703815

SELECT a.val, b.val FROM a LEFT OUTER JOIN b ON (a.key=b.key)

對應所有 a 表中的記錄都有一條記錄輸出。輸出的結果應該是 a.val, b.val，當 a.key=b.key 時，而當 b.key 中找不到等值的 a.key 記錄時也會輸出 a.val, NULL。「FROM a LEFT OUTER JOIN b」這句一定要寫在同一行——意思是 a 表在 b 表的左邊，所以 a 表中的所有記錄都被保留了；「a RIGHT OUTER JOIN b」會保留所有 b 表的記錄。OUTER JOIN 語義應該是遵循標准 SQL spec的。

http://rapapa.net/wp/wp-content/uploads/2012/06/Visual_SQL_JOINS_V2.png

Json with JavaScript

http://blog.roodo.com/syshen/archives/1410294.html
http://stackoverflow.com/questions/684672/loop-through-javascript-object

Limit or re-format x-axis items?


Highcharts how to use JavaScript variable as series data source?

line-time-series

http://www.highslide.com/forum/viewtopic.php?f=9&t=7665

http://stackoverflow.com/questions/8648861/how-to-use-epoch-time-with-highcharts-series-data