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Offline mobile HTML5 map client

Collecting some research for Offline mobile HTML5 map client.

1. Research one

Phonegap + Leaflet + TileMill = Offline Mobile Maps  

json2 vs jquery json

Blog Terms: 

json native, json2, json3 vs jquery json


Regular Expression, 3 digi number, only 5 times' numbers are allowed

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Number from 0-999, only 5 times' numbers are allowed: 0, 5, 10, 15, 20... 995
The following is the test in javascript:

var reg = new RegExp('^(\\d{0,2}[0,5])$');

How to select records with given interval

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How to select records with every N records' interval?
Using the rank(), this is the the snipet, for Oracle:
Table name: tableabc,
id  |  time  |   test
SELECT id, rank() over (partition by 1 order by time) as interval, test
                                   FROM  tableabc 

Force Internet Explorer to display content in the available highest mode

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The X-UA-Compatible meta tag allows web authors to choose what version of Internet Explorer the page should be rendered as. IE11+ have changes to these modes. See IE11 note below.

Simplify your polyline but keep its form

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If you need add a polyline or polygon to draw a country/state shape in Google Map/OSM, maybe you will get performence problem because of the huge collection of points in your polyline.
Then you need this javascript library: Simplify.js

apk2bar got "Android SDK path is not set" after ADT updated

After my Android ADT was updated, i found the blackberry apk2bar does not work anymote. It throws always "Android SDK path is not set" Even I have set it in system envrionment.

There is 2 solutions:

1 . As a temporary solution, you can copy all of the files from /build-tools/17.0.0 back to /platform-tools. This will allow our tools (apk2barVerfifier, apk2bar, etc.) to function as expected. You may need to provide the SDK location directly to the tool, depending how you've got things setup.

2. I prefer andhave tested this solution:

navigator.geolocation not work in Android 4.1.2, soulution

One hybrid app with Phonegap 1.9.0 worked fine in Android 3.0 and 4.0, but when I update the OS to 4.1.2, the navigator.geolocation stop working.
Firstly i update the project with new version of phonegap cordova 2.7.0, it does not help. And I found even i test navigator.geolocation in Android native brower, under this demo link:
The gps operation was never be called. And i found many other developers have same problem in new Android OS.

At last I found one solution(not 100%, but at least works now):
My orginal code:


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