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lrthw/exercises/ex41.rb

98 lines
2.2 KiB
Ruby

require "open-uri"
WORD_URL = "http://learncodethehardway.org/words.txt"
WORDS = []
PHRASES = {
"class ### < ###\nend" =>
"Make a class named ### that is-a ###.",
"class ###\n\tdef initialize(@@@)\n\tend\nend" =>
"class ### has-a initialize that takes @@@ parameters.",
"class ###\n\tdef ***(@@@)\n\tend\nend" =>
"class ### has-a function named *** that takes @@@ parameters.",
"*** = ###.new()" =>
"Set *** to an instance of class ###.",
"***.***(@@@)" =>
"From *** get the *** function, and call it with parameters @@@.",
"***.*** = '***'" =>
"From *** get the *** attribute and set it to '***'."
}
PHRASE_FIRST = ARGV[0] == "english"
URI.open(WORD_URL) { |f|
f.each_line do |word|
WORDS.push(word.chomp)
end
}
def craft_names(rand_words, snippet, pattern, caps = false)
names = snippet.scan(pattern).map do
word = rand_words.pop
caps ? word.capitalize : word
end
names * 2
end
def craft_params(rand_words, snippet, pattern)
names = (0...snippet.scan(pattern).length).map do
param_count = rand(1..3)
params = (0...param_count).map do |x|
rand_words.pop
end
params.join(", ")
end
names * 2
end
def convert(snippet, phrase)
rand_words = WORDS.sort_by { rand }
class_names = craft_names(rand_words, snippet, /###/, caps = true)
other_names = craft_names(rand_words, snippet, /\*\*\*/)
param_names = craft_params(rand_words, snippet, /@@@/)
results = []
[snippet, phrase].each do |sentence|
# fake class names, also copies sentence
result = sentence.gsub("###") do |x|
class_names.pop
end
# fake other names
result.gsub!("***") do |x|
other_names.pop
end
# fake parameter lists
result.gsub!(/@@@/) do |x|
param_names.pop
end
results.push(result)
end
results
end
# keep going until they hit CTRL-D
loop do
snippets = PHRASES.keys.sort_by { rand }
snippets.each do |snippet|
phrase = PHRASES[snippet]
question, answer = convert(snippet, phrase)
if PHRASE_FIRST
question, answer = answer, question
end
print question, "\n\n> "
exit(0) unless $stdin.gets
puts "\nANSWER: %s\n\n" % answer
end
end