refactoring

Misko Hevery's Clean Code Talk shows how to use object-oriented techniques such as polymorphism to remove repeated if and switch statements. The result is code that is easier to test, understand and maintain.

A brief demo of the Smalltalk debugger, including defining a method that doesn't exist yet while the program is stopped mid-crash.

Ward Cunningham explains the history and intent of the debt metaphor, which he coined while refactoring the WyCash product. He says debt means code reflecting an incomplete understanding of the problem, not sloppy programming.

Linus Torvalds gives a Google tech talk on git, the source control system he created two years earlier. He argues for distributed version control over centralized systems such as CVS and Subversion.

A 2008 Google Tech Talk by the creator of Org-mode, introducing the Emacs subsystem for plain-text note-taking and project planning. It covers outlines, TODO states, tags, dates and priorities, and later shows using Org-mode as a spreadsheet.

A two-minute 2008 clip from Sun's Fishworks team in which Brendan Gregg uses DTrace to show disk latency spiking while he shouts at a rack of drives. Bryan Cantrill narrates the demonstration.

A 2007 Google Tech Talk in which Bryan Cantrill demonstrates DTrace and explains how it improves debugging of both development and live production systems.

John Allspaw and Paul Hammond's Velocity 09 talk on how Flickr achieved ten or more deploys per day through close cooperation between development and operations.

Vim author Bram Moolenaar's 2007 Google Tech Talk on habits for efficient text editing: find inefficiencies in your own editing, then learn the Vim commands that fix them.

A roughly ten-minute demo of Microsoft's Intentional Programming research system, showing its editor and an unusual way of working with code. It is the first of two clips cut from a longer video.

Part 2 of an old Microsoft Research demo of Intentional Programming, showing the compiler side of a system that stores programs as abstract structure rather than text. The uploader says the companion editor clip is clearer.