检查数组中的子字符串并在 ruby 中替换它们答案

【问题标题】：Checking substrings in array and replacing them in ruby检查数组中的子字符串并在 ruby 中替换它们
【发布时间】：2019-03-11 12:51:05
【问题描述】：

我被要求编写一个程序，用"CENSORED" 替换数组test_tweets 中匹配banned_phrases 数组中的单词的单词。

test_tweets = [
  "This politician sucks!",
  "I hate this Government!",
  "I can't believe we're living with such a bad politician. We were so foolish",
  "Politicianname is a danger to society. I hate that he's so bad – it sucks."
  ]

banned_phrases = ["sucks", "bad", "hate", "foolish", "danger to society"]

我不知道是什么方法可以做到这一点。

【问题讨论】：

如何将“test_tweets”中匹配“banned_phrases”的单词替换为“CENSORED”？
您要过滤，然后替换吗？过滤意味着删除，这使得替换没有意义。
对不起，我的意思是替换

标签： arrays ruby string

【解决方案1】：

试试map + inject:

filtered = test_tweets.map do |tweet|
  banned_phrases.inject(tweet) do |r, phrase|
    r.gsub phrase, 'CENSORED'
  end
end

【讨论】：

【解决方案2】：

re = Regexp.union(banned_phrases)
# => /sucks|bad|hate|foolish|danger\ to\ society/
test_tweets.map{|s| s.gsub(re, "CENSORED")}

输出是：

[
  "This politician CENSORED!",
  "I CENSORED this Government!",
  "I can't believe we're living with such a CENSORED politician. We were so CENSORED",
  "Politicianname is a CENSORED. I CENSORED that he's so CENSORED – it CENSORED."
]

【讨论】：