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Add final updates to notebook and add readme
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@alkrauss48
alkrauss48 committed Jun 11, 2015
1 parent 538ebf7 commit cf7b520
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71 changes: 40 additions & 31 deletions metaprogramming-ruby-talk/.ipynb_checkpoints/Metaprogramming with Ruby-checkpoint.ipynb
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}
},
"source": [
"Yes, but *metaprogramming* typically refers to something else in **Ruby**"
"Yes, but metaprogramming typically refers to something else in **Ruby**"
]
},
{
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}
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"source": [
"The method Array#replace method already exists, and it swaps out the entire array with another array that you provide as an arg. We just overwrote that method."
"The Array#replace method already exists, and it swaps out the entire array with another array that you provide as an arg. We just overwrote that method."
]
},
{
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"Key things of note here:\n",
" \n",
"* Instantiated objects have a class of **MyClass** \n",
"* MyClass - also an object - has a class of **Class**\n",
"* MyClass has a class of **Class** and is also an object\n",
"* While MyClass has a class of Class, it inherits from **Object**"
]
},
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Expand All @@ -568,14 +568,14 @@
"\n",
"class OKCRB\n",
" def is_boss?\n",
" puts \"true\"\n",
" true\n",
" end\n",
"end\n",
"\n",
"# New Code\n",
"\n",
"okcrb = OKCRB.new\n",
"okcrb.send(\"is_boss?\")"
"puts okcrb.send(\"is_boss?\")"
]
},
{
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Expand All @@ -668,7 +668,7 @@
"\n",
"b = Book.new\n",
"b.read\n",
"# b.read('a', 'b') { \"foo\" }"
"b.read('a', 'b') { \"foo\" }"
]
},
{
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Expand All @@ -839,11 +839,18 @@
"\n",
"# the dynamic way\n",
"Book = Class.new do\n",
" def foo\n",
" \"foo!\"\n",
" end\n",
" \n",
" #Both method declaration types work\n",
" \n",
" define_method('title') do\n",
" \"All My Friends Are Dead\"\n",
" end\n",
"end\n",
"\n",
"puts Book.new.foo\n",
"puts Book.new.title"
]
},
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Expand All @@ -888,6 +895,7 @@
"MyClass = Class.new do\n",
" \"#{my_var} in the class definition\"\n",
" \n",
" # Have to use dynamic method creation to access my_var\n",
" define_method :my_method do\n",
" \"#{my_var} in the method\"\n",
" end\n",
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"%%ruby\n",
"\n",
"def proc_example\n",
" p = proc {|x,y| return x*y }\n",
" p = proc {|x,y| return x*y }\n",
" result = p.call(2, 4) * 10\n",
" return result\n",
"end\n",
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Expand All @@ -1191,6 +1199,7 @@
"%%ruby\n",
"\n",
"def add_method_to(a_class)\n",
"\n",
" a_class.class_eval do\n",
" def m; 'Hello!'; end\n",
" end\n",
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},
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Expand All @@ -1283,7 +1292,7 @@
"klass = \"Book\"\n",
"instance_var = \"title\"\n",
"\n",
"eval <<-CODE\n",
"eval <<-CODE # This is just a multi-line string\n",
" class #{klass}\n",
" attr_accessor :#{instance_var}\n",
"\n",
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},
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Expand All @@ -1339,7 +1348,7 @@
" puts eval code\n",
"end\n",
"\n",
"explore_array(\"find_index('b')\")\n",
"explore_array(\"find_index('c')\")\n",
"\n",
"# explore_array(\"object_id; Dir.glob('*')\")"
]
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},
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"source": [
"# Thanks!\n",
"\n",
"@thecodeboss\n",
"[@thecodeboss](https://twitter.com/thecodeboss/)\n",
"\n",
"https://github.com/alkrauss48\n",
"\n",
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