tl;dr:Various keyboard shortcuts and sequences related to control, escape, and meta keys in Unix / Linux terminals, this article covers: (1) Terminal tricks (2) Control codes. (3) Meta key sequences (4) Vim tricks.
tl;dr:"For many of us who were introduced to the Internet during that time, writing an IRC bot turned out to be one of our first few non-trivial hobby programming projects that involved network sockets, did something meaningful, and served actual users." Susam illustrates how simple the IRC protocol is.
tl;dr:The output of Susam's example shows simple Python code that create a self-referential list, although it's not obvious as to why, expecting the code to have failed with NameError.