我正在编写一个小的Ruby Sinatra应用程序，用Mad Libs类型的正则表达式替换字符串片段。我正在加载JSON对象以获取字符串，并且我使用“sample”方法获取随机值。这并不能解决仅使用一次值的问题。有人可以帮忙吗？
来源：
get '/' do
paragraph = ""
vocab = JSON.parse(File.read('music-journalism-vocabulary.json'))
artist_types = ["male","female","plural"]
artist = ""
artist_type = artist_types.delete artist_types.sample
artist = vocab["artist-#{artist_type}"].sample
case artist_type
when "male"
artist_posessive_pronoun = "his"
when "female"
artist_posessive_pronoun = "her"
when "plural"
artist_posessive_pronoun = "their"
else
end
sentences = []
sentences << vocab["sentence-intro"].sample
sentences << vocab["sentence-middle"].sample
sentences << vocab["sentence-conclusion"].sample
sentences.each_with_index do |iter, i|
sentence = iter.dup
sentence_with_replacement = sentence.dup
# Handle plural agreement
if (artist_type == "plural")
sentence_with_replacement.gsub!(/\*artist-subject\*/, "*artist-subject*s")
end
word_types = vocab.keys
word_types.each_with_index do |word_type, j|
sentence = ''
while sentence != sentence_with_replacement do
sentence = sentence_with_replacement.dup
sentence_with_replacement = sentence.sub(/\*#{word_type}\*/, vocab[word_type].sample)
end
end
sentence_with_replacement.gsub!(/\*artist\*/, artist)
# Subject-pronoun agreement
sentence_with_replacement.gsub!(/\*posessive-pronoun\*/, artist_posessive_pronoun)
sentence_with_replacement[0] = sentence_with_replacement.capitalize[0]
paragraph << "#{sentence_with_replacement} "
end
paragraph
end
JSON文件：
{
"artist-male": ["Skrillex",
"Bon Iver",
"A$AP Rocky",
"Earl Sweatshirt",
"Frank Ocean"
],
"artist-female": ["Grimes"
],
"artist-plural": ["Death Grips",
"Best Coast",
"Toro Y Moi",
"Odd Future",
"Gold Panda",
"Icona Pop",
"Foxygen",
"Four Tet"
],
"adverb": [
"inarguably",
"inevitably",
"reliably",
"positively",
"truly",
"genuinely",
"sharply",
"intricately",
"hopelessly"
],
"adjective": [
"chrome-plated",
"lonely",
"mossy",
"poised",
"lysergic",
"solid-state",
"lyrical",
"id-driven",
"rubbery",
"hard",
"striated",
"electroacoustic",
"tarnished",
"radiophonic",
"wispy",
"soul-deep",
"minimal",
"lulling",
"insular",
"nostalgic",
"vacant",
"feminine",
"sensual",
"meditative",
"somnambulant",
"velvet-gloved",
"melodic",
"confessional",
"rollercoaster",
"thrilling",
"crunchy",
"lush",
"deranged",
"shambolic",
"stalwart",
"ephemeral",
"gentle",
"angular",
"sanctified",
"austere",
"cinematic",
"focused",
"sheer",
"purring",
"rangy",
"jittery",
"world-weary",
"slippery",
"colorful",
"multi-layered",
"complex",
"tentative",
"apocalyptic",
"eerie",
"withering",
"clattering",
"20th-century",
"impressionist",
"Glass-ian",
"distorted",
"raw",
"wild",
"gleaming",
"evocative",
"otherworldly",
"melancholic",
"lugubrious",
"phlegmatic",
"sanguine",
"analog",
"delirious",
"Aristotelian",
"slick",
"rudderless",
"radio-ready",
"knotty",
"demonstrative",
"thousand-watt"
],
"adjective-prefix": [
"quasi-",
"aggro-",
"hobo-",
"über-"
],
"comparative": [
"darker",
"lonelier",
"sharper",
"subtler"
],
"artist-subject": [
"mannerist",
"architect",
"enfant terrible",
"spectre",
"vaudevillian",
"sine qua non"
],
"album-subject": [
"endeavor",
"release",
"amalgamation",
"offering",
"approach",
"diversion",
"reimagining",
"capital-A album"
],
"style-noun": [
"skronk",
"techno-future",
"jangle-funk",
"jungle-metal",
"Philly-soul",
"skate-punk",
"synth-schlock",
"high-goth",
"alt-country",
"Afrobeat",
"French chanson",
"pop balladry"
],
"meaning-noun": [
"legacy",
"monumentality",
"séance",
"splendor",
"drama",
"grit",
"sexiness",
"mutability",
"tragedy",
"grief",
"ardor",
"celebration",
"ennui",
"euphoria",
"beauty",
"majesty",
"nimbleness",
"humility",
"aggression"
],
"meaning-verb": [
"flaunt",
"sweep",
"woo",
"conjure"
],
"judgement-noun": [
"confidence",
"boldness",
"swagger",
"vigor",
"prowess",
"mastery"
],
"judgement-adjective": [
"unsurpassed",
"entrancing",
"enlightenment-inducing",
"universal",
"well-rehearsed",
"impeccable",
"revelatory",
"transcendent",
"stunning"
],
"judgement-verb": [
"triumph",
"succeed",
"soar",
"captivate",
"shimmer"
],
"technique-noun": [
"white noise",
"baritone",
"rhythm guitar",
"soliloquy",
"beatbox",
"crescendo",
"production",
"drones",
"whiplash",
"showboating",
"schtick"
],
"technique-noun-plural": [
"hard angles",
"pulsations",
"bons mots",
"verbal gymnastics",
"grooves",
"strings",
"drones",
"acerbics",
"harmonies",
"sonorities",
"cadences",
"mantras",
"vocoders",
"squelches"
],
"technique-verb": [
"sway",
"swagger",
"assemble",
"croon",
"protest",
"transform",
"dissolve"
],
"character-phrase": [
"with money to burn",
"against all odds",
"par excellence",
"for the *non-music-reference* generation",
"with a yen for *drug*",
"ready to cash in"
],
"drug": [
"barbituates",
"opiates",
"box wine",
"laudanum",
"mescaline",
"dead-stock quaaludes"
],
"non-music-reference": [
"Buzzfeed",
"Twitter",
"Honey Boo Boo",
"Hulu",
"MySpace"
],
"sentence-intro": ["Amid the growing fashionability of *adjective* *technique-noun* and *adjective* *technique-noun*, *artist*'s new *album-subject* distinguishes itself with *meaning-noun* and *judgement-noun*.",
"*artist* reappeared with *posessive-pronoun* latest *album-subject* as *adjective* *artist-subject* *character-phrase*."
],
"sentence-middle": [
"*posessive-pronoun* latest *album-subject* is discernably *posessive-pronoun* attempt to *technique-verb* the *adjective* *technique-noun-plural* that a more typically *style-noun* *album-subject* would employ, with particular attention paid to the *adjective* delivery of *adjective-prefix**adjective* *meaning-noun*.",
"*posessive-pronoun* latest *album-subject* is *comparative*, *judgement-adjective*; *adverb* *adjective* and *adjective*, full of *technique-noun* and *adjective* *technique-noun*.",
"The *adjective* *judgement-noun* of *posessive-pronoun* *adjective* *meaning-noun* *judgement-verb*s, and *posessive-pronoun* *style-noun* *judgement-noun* is *adverb* *judgement-adjective*.",
"To say *posessive-pronoun* *album-subject* is \"*adjective*\" is a gross understatement—in the hands of *artist*, *style-noun* is *adverb* transformed from *adjective* *meaning-noun* into *adjective*, *adjective-prefix**adjective* *meaning-noun*.",
"*posessive-pronoun* *judgement-adjective* *album-subject* is *meaning-noun* by design –– *adjective* *style-noun* by way of *judgement-adjective*, *adjective* *technique-noun*.",
"*posessive-pronoun* new *album-subject* is *adverb* a more *adjective*, *adjective* work than *posessive-pronoun* last, and suggests its *technique-noun-plural* are as much *adjective* as they are *adjective*.",
"If the opening track *adverb* assumes the *adjective* *technique-noun* of *adjective* *style-noun*, it prefers to *technique-verb* rather than to *technique-verb*.",
"For all the *adjective* *technique-noun* heard on *posessive-pronoun* last *album-subject*, these performances are for the most part *adjective-prefix**adjective* and *judgement-adjective*, making *posessive-pronoun* songs *comparative* than their *adjective* *technique-noun-plural* initially suggest."
],
"sentence-conclusion": [
"And, forgiving the obligatory *adjective* *technique-noun*, one can almost detect the *adjective* *style-noun* that might have subsumed this otherwise-*adjective* *style-noun* *meaning-noun*.",
"Still, seeing these *adjective* songs through their *adjective* *technique-noun-plural* is more than *adjective*, if only for the promised *adjective-prefix**adjective* *technique-noun-plural* and *adjective* *judgement-noun*."
]
}
感谢。
答案 0 :(得分：1)
您可以在Array中定义一个新方法（我们使用！来表示原始数组已被修改）：
class Array
def deal!
self.slice!(rand(self.length-1))
end
end
foo = [1,2,3,4,5]
puts "deal #{foo.deal!}"
puts "deal #{foo.deal!}"
puts "deal #{foo.deal!}"
puts "deal #{foo.deal!}"
puts "deal #{foo.deal!}"