The Image interface is at the core of image manipulation in Go. No matter what format you want to import or export from, it ultimately ends up as an Image. This is where the beauty of Go interfaces really shines. Go comes with support for gif, jpeg, and png formats in the standard packages. These examples demonstrate how to programatically generate, encode, decode, write to file, and base64 encode images. We will also cover a little bit about interfaces.
There is a wget package available for Node.js that makes it really easy to integrate the convenience of wget in to a Node.js program. It is useful for downloading a file from any number of protocols. This example shows you how to download a file using wget in Node.js
These code snippets demonstrate how to access command line arguments for a Node.js program.
jQuery provide a convenient way to access elements using CSS selectors. Node.js has a package called Cheerio that allows us to make jQuery style code. The Request module can be used in tandem to provide the ability to perform an HTTP GET to fetch remote HTML documents. That is useful for web scraping.
Perl is commonly used for sysadmin tasks which frequently involves managing files. These examples demonstrate how to read, write, and append files with Perl.
This example shows how to get information from the user using Standard Input (STDIN), which is typically the keyboard.
Exif information is a group of meta tags stored on an image. It can contain information about the image, the camera used to take it, software used to manipulate it, latitude and longitude, and even more. This example shows how to use Perl to extract and manipulate image exif data.