understanding javascript execution context, what the hell the variable is?
If you are a C programmer, you must know you can not declare a variable using the same name as the function formal parameter in the same scope: void foo(int […]
a simple example of jquery, ajax.post, and php
I’ve learned enough about ajax, from javascript ajax to jquery ajax, from client side to server side, from asp to php, from form submit to various data types encoding and […]
How to add markers on double-click?
We’ve learned how to add markers on map. In that example, the marker is added when the map is loaded, and its location is predetermined. How to add a marker […]
How to pop up an information window when clicking a marker on map?
We’ve learned how to add markers on map using baidu map api. An often encountered use case is when user clicks on a marker, an information window pops up showing […]
How to use baidu map api to add markers on map?
An important feature of a map application is the ability of adding/displaying markers on a map. Markers, together with other elements such as labels, poly-lines,polygons, circles, etc. are called overlays […]
How to use baidu map api to add controls on the map?
In previous tutorial of baidu map api, we’ve learned how to use baidu map api to display a map on web page. That is exiting, but the displayed map seems […]
How to use baidu map api to display a map?
Here is the official guide of baidu map api to display a map, but it does not work if you copy paste it into your web page. <!DOCTYPE html> <html> […]
QFile::flush and QTextStream::flush
Here is a code snippet writing data to a file: QFile outfile(“file.txt”); if (!outfile.open(QIODevice::Append)) { exit(); } QTextStream out(&outfile); out.setCodec(“UTF-8”); for(int i=0;i<100000;i++) { out<<“somedata”; } outfile.close(); If you press the […]
How to upgrade python2.6 to python2.7 on CentOS 6.5?
I have problem running a python script developed using python2.7. My python environment is Python2.6.6 under CentOS 6.5. Some code is broken when running in old python version. For example, […]
How to install python packages ignoring ssl certificate verification?
Python programming under windows has the same headache problem as programming in Linux: you have to install missing dependent packages endlessly. I installed python 2.7 under Windows, and now I […]