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The text below is the comment from the top of src/clojinc/core.clj. When it refers to "this file" it is referring to that file. ;; clojinc ;; Steps toward clojure, starting from zero. ;; by Lee Spector <email@example.com>, 2011-2012 ;; Version (date): 20120825 ;; This file is a saved, re-executable Clojure REPL (Read Eval Print Loop) ;; session, with minimal comments and occasional problem sets. It is intended ;; to serve as the starting-point for semi-independent learning of the Clojure ;; programming language, for people who have at least some minimal experience ;; with at least one (any) programming language. No help is provided here for ;; getting a Clojure implementation/REPL up and running; consult the online ;; resources listed below, or search the web, if you need help with that. ;; The format of this file is alternating Clojure expressions with ;; commented-out output (including both the output produced by explicit print ;; statements and the values returned by the evaluated expressions). You should ;; be able to proceed through the file, evaluating an expression at a time, and ;; if you do this you should get the same output (or similar output, in cases ;; that involve nondeterminism). In many cases later expressions rely on having ;; evaluated earlier expressions in the file. ;; The material in this file is informal and idiosyncratic in its coverage, ;; leaving out many things that other Clojure introductions include and revealing ;; the Lisp-oriented bias of the author. The intention is just to lead beginners ;; deeply enough into Clojure territory for them to proceed in other directions ;; on their own. ;; More specifically, we begin with simple expressions for arithmetic and list ;; manipulation, introduce facilities for defining functions and macros, and give ;; progressively more complex examples of definitions that involve many of ;; Clojure's data structures including lists, vectors, maps, and sets. Among the ;; applications used for examples and problem sets are grammar-driven text ;; generation, genetic programming, and simple graphics. We also demonstrate ;; alternatives for defining iterative and recursive algorithms and briefly touch ;; upon topics ranging from debugging and profiling to file I/O and concurrency. ;; Many things are introduced here without explanation. My suggestion is that ;; you observe the output that is provided here, look things up in online resources ;; and in documentation that may be available in your Clojure environment, and, ;; most crucially, experiment with variations of the expressions presented here. ;; The problem sets are prods for further experimentation but it is best to ;; experiment continuously. Some of the problems provided here are easy, some are ;; quite hard, and many could be completed/varied/extended in several different ;; ways. ;; Potentially useful online resources include: ;; http://clojure.org ;; http://dev.clojure.org/display/doc/Getting+Started ;; http://groups.google.com/group/clojure ;; http://4clojure.com ;; http://clojuredocs.org ;; http://www.clojure-toolbox.com ;; http://www.clojureatlas.com ;; http://alexott.net/en/clojure/video.html ;; http://planet.clojure.in/ ;; Most of the outputs in clojinc were created using clojure version 1.3 in a ;; REPL started with Leiningen 1.7.1 (https://github.com/technomancy/leiningen) ;; and using Java 1.6.0_33. (A few were left from an earlier version, for which ;; Clooj (https://github.com/arthuredelstein/clooj) was used.