calculate the sunrise and sunset of the point directly through the GPS latitude and longitude. Because the method is accurate to the point, so the error is only a few seconds, and "6 Point Sunrise 18 Sunset", the error within half an hour. This requires complex scientific calculations, which can be implemented in a code base.MoreThe principle behind the map application is much more than that. China's unique coordinate distortions and offsets are also
Some days ago, because users are scattered in different countries, a need was required to manually determine the time zone where users are located, there are several solutions for converting the time into the local time. The IP address database is simpler than the local time
STRUTS2 type Converter Code time
Datetypeconverter.java
Package a.b;
Import java.text.ParseException;
Import Java.text.SimpleDateFormat;
Import java.util.Date;
Import Java.util.Map;
Import Com.opensymphony.xwork2.conversion.impl.DefaultTypeConverter;
public class Datetypeconverter extends Defaulttypeconverter {
@Override the public
Object Convertvalue (map
, referred to as UTC, comes from English Universal Time / French Coordinated Time "Universal Time / Temps Cordonné". The time difference between China, Hong Kong, Macau, Taiwan, Mongolia, Singapore, Malaysia, Philippines, Western Australia and UTC is +8, which is UTC + 8.
GMT: Greenwich Mean
) ' ' String conversion time also needs to be changed to ' ' Gotime. Parseinlocation ("2006-01-02 15:04:05", "2018-01-15 12:11:12", time. Local) "This time the library time zone problem can be solved, but the reading library problem is as follows: ' ' rss, err: = this. Repo.
library time zone problem can be solved, but read the library problems as follows:
rss, Err: = this. Repo.query (CTX, SQLSTR, POS, now, OS) images: = Make ([]*models. imageconf, 0, Len (RSS)) for _, rs: = Range RSS {var tmpimage models. Imageconf maptostruct (RS, tmpimage) images = append (images, tmpimage)}func maptostruct (mapping map[string] []byte, J interfa
A few days ago encountered such a business scenario, the database runs in the Docker, the Docker city is UTC so it is 8 hours away from the Beijing time. However, you cannot rerun a container, only to ensure that the database is running, and to copy the host's time zone to the Docker container. Very distressed,
First I change the host's
Learning D3.js (hereinafter referred to as D3) also has a period of time, run D3 do a few projects. I found that Chinese D3 tutorials very few, foreign materials but require a certain degree of English reading ability (recommended site: Http://bl.ocks.org/mbostock), so the germination of writing a D3 practical use of the idea of a series of articles, now began to pay action. In the series, I will use D3+HTML5 canvas to achieve some practical effects (
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