javascript

With Flash or Without Flash ? flXHR or jXHR ?

The Google Map Image Cutter is an application designed to take any image or digital photo and cut it into tiles which are displayed on a Google Map. Using this tool, large images can be published on the web in a format that allows the user to pan and zoom using the standard Google Maps interface. Although publishing large digital photos is the most obvious application, this technique can also be used for annotated maps of an area that are not to scale e.g. directions for how to get to the office.

The developers at Digg have come up with an interesting way to speed up load times of high performance websites. They have taken the idea that reducing the number of HTTP requests per page speeds up website performance, and come up with a technique called MXHR (Multipart XMLHttpRequests). MXHR works by bundling files, sending them through a single request, then separating them for use once they head down the pipe.

JSLint is a JavaScript program that looks for problems in JavaScript programs.

When C was a young programming language, there were several common programming errors that were not caught by the primitive compilers, so an accessory program called lint was developed which would scan a source file, looking for problems.

The Persevere project is an open source set of tools for persistence and distributed computing using intuitive standards-based JSON interfaces of HTTP REST, JSON-RPC, JSONPath, and HTTP Channels. The core of the Persevere project is the Persevere Server. The Persevere server includes a Persevere JavaScript client, but the standards-based interface is intended to be used with any framework or client.

A pure-JavaScript CSS selector engine designed to be easily dropped in to a host library.
Features:

* Completely standalone (no library dependencies)
* Competitive performance for most frequently used selectors
* Only 4KB minified and gzipped
* Highly extensible with easy-to-use API
* Designed for optimal performance with event delegation