There are many ways to draw a map.

• ArcGIS, QGIS
  With ArcGIS and QGIS, firstly we need a shapefile of target area.

Sublimerge is a sublime tool used for text comparision.

Installation

ctid

Every table has several system columns that are implicitly defined by the system.
ctid, the physical location of the row version within its table. Note that although the ctid can be used to locate the row version very quickly, a row’s ctid will change each time it is updated or moved by VACUUM FULL. Therefore ctid is useless as a long-term row identifier. The OID, or even better a user-defined serial number, should be used to identify logical rows.

Regular expression is used for pattern matching. It’s a powerful and handy tool for text filteration.

When dealing with Chinese characters, decoding disorder might be a normal problem, espatially, with cross platform development.

Some error like:

impress.js is a presentation framework based on the power of CSS3 transforms and transitions in modern browsers and inspired by the idea behind prezi.com.

Raphaël is a small JavaScript library that should simplify your work with vector graphics on the web.
It uses SVG for creating graphics.

Load data

pgcsv is used for load csv data into Postgres.

Hot keys

Just some Vim essential notes for learning use. :)

What is Timestamp

The unix time stamp is a way to track time as a running total of seconds. This count starts at the Unix Epoch on January 1st, 1970 at UTC.