# HG changeset patch
# User IBBoard <dev@ibboard.co.uk>
# Date 1483475776 0
# Node ID ebb19742b98fa3662decfb62fd819e6a0caeaab9
# Parent  9aa1eba404f0a0304ff447c2bf437aa6720448f6
Add some minor experiments with hashes (hash tables)

diff -r 9aa1eba404f0 -r ebb19742b98f 1-Ruby/hashes-irb.output
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/1-Ruby/hashes-irb.output	Tue Jan 03 20:36:16 2017 +0000
@@ -0,0 +1,21 @@
+hashes.rb(main):001:0> #! /usr/bin/env ruby
+hashes.rb(main):002:0* 
+hashes.rb(main):003:0* # Ruby has inline hashmap definitions, like PHP.
+hashes.rb(main):004:0* # Java doesn't. C# isn't quite as clear as this "key => value" pattern.
+hashes.rb(main):005:0* frenchify = { 'one' => 'un', 'two' => 'deux' }
+=> {"one"=>"un", "two"=>"deux"}
+hashes.rb(main):006:0> puts frenchify['one']
+un
+=> nil
+hashes.rb(main):007:0> 
+hashes.rb(main):008:0* # Or, done properly with symbols:
+hashes.rb(main):009:0* frenchify = { :one => 'un', :two => 'deux' }
+=> {:one=>"un", :two=>"deux"}
+hashes.rb(main):010:0> puts frenchify[:one]
+un
+=> nil
+hashes.rb(main):011:0> # But what is a symbol? Its own class, apparently!
+hashes.rb(main):012:0* puts :one.classhashes.rb(main):012:0* 
+hashes.rb(main):012:0> 
+Symbol
+=> nil
diff -r 9aa1eba404f0 -r ebb19742b98f 1-Ruby/hashes-ruby.output
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/1-Ruby/hashes-ruby.output	Tue Jan 03 20:36:16 2017 +0000
@@ -0,0 +1,3 @@
+un
+un
+Symbol
diff -r 9aa1eba404f0 -r ebb19742b98f 1-Ruby/hashes.rb
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/1-Ruby/hashes.rb	Tue Jan 03 20:36:16 2017 +0000
@@ -0,0 +1,12 @@
+#! /usr/bin/env ruby
+
+# Ruby has inline hashmap definitions, like PHP.
+# Java doesn't. C# isn't quite as clear as this "key => value" pattern.
+frenchify = { 'one' => 'un', 'two' => 'deux' }
+puts frenchify['one']
+
+# Or, done properly with symbols:
+frenchify = { :one => 'un', :two => 'deux' }
+puts frenchify[:one]
+# But what is a symbol? Its own class, apparently!
+puts :one.class
\ No newline at end of file