content: rename articles to reinforce convention of short URLs

The Go blog started out on Blogger
(http://web.archive.org/web/20100325005843/http://blog.golang.org/).
Later, we moved to the current self-hosted blog server
with extra Go-specific functionality like playground snippets.

The old Blogger posts have very long URLs that Blogger chose
for us, such as "go-programming-language-turns-two" or
"two-go-talks-lexical-scanning-in-go-and", predating
the convention of giving posts shorter, more share-friendly,
typeable names.

The conversion of the old Blogger posts also predated
the convention of putting supporting files in a subdirectory.

The result is that although we've established new conventions,
you wouldn't know by listing the directory - the old Blogger
content presents a conflicting picture.

This commit renames the posts with very long names
to have shorter, more share-friendly names, and it moves
all supporting files to subdirectories. It also adds a README
documenting the conventions.

For example, blog.golang.org/go-programming-language-turns-two
is now blog.golang.org/2years, matching our more recent birthday
post URLs, and its supporting files are moved to the new 2years/ directory.

The old URLs redirect to the new ones.

Change-Id: I9f46a790c2c8fab8459aeda73d4e3d2efc86d88f
Reviewed-on: https://go-review.googlesource.com/c/blog/+/223599
Run-TryBot: Russ Cox <rsc@golang.org>
Reviewed-by: Andrew Bonventre <andybons@golang.org>

1 files changed, 19 insertions, 0 deletions

diff --git a/content/functions-codewalk.article b/content/functions-codewalk.article
new file mode 100644
index 0000000..1ae0b84
--- /dev/null
+++ b/content/functions-codewalk.article
@@ -0,0 +1,19 @@
+# First Class Functions in Go
+30 Jun 2011
+Tags: codewalk, function, technical
+Summary: Announcing a new Go codewalk, exploring first class functions.
+OldURL: /first-class-functions-in-go-and-new-go
+
+Andrew Gerrand
+
+##
+
+Programmers new to Go are often surprised by its support for function types,
+functions as values, and closures.
+The [First Class Functions in Go](https://golang.org/doc/codewalk/functions/)
+code walk demonstrates these features with a simulation of the dice game
+[Pig](http://en.wikipedia.org/wiki/Pig_(dice)).
+It is a pretty program that uses the language to great effect,
+and a fun read for Go beginners and veterans alike.
+
+More resources are available at [golang.org](https://golang.org/doc/docs.html).