# HG changeset patch
# User Steve Losh <steve@stevelosh.com>
# Date 1467041998 0
# Node ID c24ab12c65fc42e7ad0300d1dc573ecf6d73e4c6
# Parent  cc9b027d5b2a93b720310c4f857d43e729a83f95
Add URLs

diff -r cc9b027d5b2a -r c24ab12c65fc content/blog/2016/06/symbolic-computation.html
--- a/content/blog/2016/06/symbolic-computation.html	Sun Jun 26 01:01:44 2016 +0000
+++ b/content/blog/2016/06/symbolic-computation.html	Mon Jun 27 15:39:58 2016 +0000
@@ -36,7 +36,7 @@
       (print (car foo))
       (print (cdr foo)))
 
-[gentle]:
+[gentle]: http://www.amazon.com/dp/0486498204/?tag=stelos-20
 
 [TOC]
 
@@ -240,8 +240,8 @@
 [`*print-readably*` variable][print-readably].  Other language have different
 mechanisms.
 
-[str_repr]:
-[print-readably]:
+[str_repr]: https://brennerm.github.io/posts/python-str-vs-repr.html
+[print-readably]: http://clhs.lisp.se/Body/v_pr_rda.htm
 
 ## Reading Non-Lisp
 
@@ -278,7 +278,7 @@
 a representation of an AST node.  Where did that come from?  To answer that
 we'll need the final letter in the acronym.
 
-[abstract syntax tree]:
+[abstract syntax tree]: https://en.wikipedia.org/wiki/Abstract_syntax_tree
 
 ## Evaluating Non-Lisp
 
@@ -418,7 +418,7 @@
 then how do we actually *do* anything in Lisp?  How does anything actually
 *run*?
 
-[clhs-symbol]:
+[clhs-symbol]: http://www.lispworks.com/documentation/lw70/CLHS/Body/t_symbol.htm
 
 ## Evaluating Lisp
 
@@ -629,10 +629,9 @@
 
 If you're not using Common Lisp, port these exercises to your language.
 
-[special-operators]:
-[ABCL]:
-[sbcl-eval]:
-[clhs-symbol]:
+[special-operators]: http://www.lispworks.com/documentation/HyperSpec/Body/03_ababa.htm
+[ABCL]: https://common-lisp.net/project/armedbear/
+[sbcl-eval]: https://github.com/sbcl/sbcl/blob/fdc4e9fa86b5eaaf8939f004a66e4be075069aa8/src/code/eval.lisp#L131-L272
 
 ## Quote
 
@@ -786,7 +785,7 @@
 * `'"hello"` reads as `(quote "hello")`
 * `'(if if if if)` reads as `(quote (if if if if))`
 
-[read macro]:
+[read macro]: https://gist.github.com/chaitanyagupta/9324402
 
 ### Exercises
 
@@ -844,9 +843,9 @@
 * Find and read *another* Lisp implementation's `eval` function.
 * Watch the [SICP Lectures][SICP] on YouTube.
 
-[PAIP]: 
-[symbolicate]:
-[packaging]:
-[SICP]:
+[PAIP]: http://www.amazon.com/dp/1558601910/?tag=stelos-20
+[symbolicate]: https://github.com/zkat/squirl/blob/f0dc57dfee728df94b2a35956e18e143e8b8d275/src/vec.lisp#L28-L38
+[packaging]: https://www-fourier.ujf-grenoble.fr/~sergerar/Papers/Packaging.pdf
+[SICP]: http://www.amazon.com/dp/0262510871/?tag=stelos-20
 
     {% endblock article %}