Signing android release apk from the command line (via ant)
This post is probably out too late ,as almost all IDE’s these days (which support android development) ,probably have an Integrated release signing or debug signing utility/wizard built in, but if somebody is using an old IDE or perhaps want to integrate release in a CI(continues integration) environment , this tutorial might come in handy.
Basically one has to sign an apk either with a debug key (which is generally present in your .
Importing Exporting CSV Files in PostgreSQL Databases via COPY
This is going to be a short article which will illustrate importing and exporting a table from or to a csv file using PostgreSQL COPY command.
Importing a table from CSV Assuming you already have a table in place with the right columns, the command is as follows
COPY FROM ‘/path/to/csv/SourceCSVFile.csv’ DELIMITERS ‘,’ CSV;
Exporting a CSV from a table. COPY TO ‘/path/to/csv/TargetCSVFile’ DELIMITERS ‘,’ CSV;
Its important to mention here that generally if your data is in unicode or need strict Encoding, then Always set client_encoding before running any of the above mentioned commands.
Raphael JS Tutorial - Part I
Raphael.JS is a SVG/VML library which helps you to create quick vector shapes and images. Its very small and compact (only 86kb),easy to use,well documented and works in all browsers and yes even IE. Here is a list of all major browsers this library works on: Chrome 5.0+ Firefox 3.0+, Safari 3.0+, Opera 9.5+ and Internet Explorer 6.0+
,finally its distributed under MIT license. In this tutorial ,I intend to introduce basics of this library and help you get started.
Position div in the center of the page using css
When I first started web programming, creating a center aligned div was one of the most common task that I saw myself doing.
since div is a block element, i.e. it takes up the full width available, and has a line break before and after it, it can easily be centered using relative styling
{ margin-left:auto; margin-right:auto; width:70%; background-color:#b0e0e6; } However lately I have preferred using absolute positioning technique over relative, this works for all browsers and is best for login screens or alert messages over a translucent shim.