部分查找单词的正则表达式问题

Question

我有一个正则表达式，它对某些单词有效，但对所有单词无效：

str.scan(/typeaheadResult\(\{\"Q\":("\w+\s?\w+\s?\w+\s?\w+"),\"R\":\[+("\w+\s?\w+\s?\w+\s?\w+")/)

下面的字符串似乎没有被捕获：

if (typeof typeaheadResult !== "undefined") { typeaheadResult({"Q":"crapshoot","R":[]}) }

我的正则表达式不适用于上述字符串，我认为这不是因为使用了不恰当的词。这是我尝试过的永久链接：http://rubular.com/r/WOr7xYPePs 它具有其余重要的示例字符串。

Answer 1

R:[ 之后的部分必须在 ".

之间至少包含 4 \w 个字符

如果它是可选的，则必须添加 ?。

更新

只需在正则表达式末尾添加 ? 即可解决问题：http://rubular.com/r/HUmtoffTmi

Answer 2

我假设每个段落最多有一个匹配项，并且要在给定的段落中有一个匹配项，"[]" 跟在 "R: 之后或者 [=14= 之后的字符串] 并以下一个双引号之前的字符结尾，以 "R":[[" 之后的字符串开始并以下一个双引号之前的字符结束。

str =<<BITTER_END
\if (typeof typeaheadResult !== "undefined") { typeaheadResult({"Q":"standing desk Mike","R":[["standing desk",[["Home",4044]]],"standing desk converter","adjustable standing desk","standing desk 48","tabletop standing desk","glass standing desk desk"]}) }

if (typeof typeaheadResult !== "undefined") { typeaheadResult({"Q":"laptop bag","R":[["laptop bag",[["Electronics",3944]]],"laptop bags for 15.6 inch laptops","laptop bags for women","laptop bag 15.6","laptop bags for 17.3 in laptops","rolling laptop bag","laptop bag with wheels","laptop bag 17\""]}) }

\if (typeof typeaheadResult !== "undefined") { typeaheadResult({"Q":"sitting desk Melba","R":[["standing desk",[["Home",4044]]],"standing desk converter","adjustable standing desk","standing desk 48","tabletop standing desk","glass standing desk desk"]}) }

if (typeof typeaheadResult !== "undefined") { typeaheadResult({"Q":"crapshoot hello","R":[]}) }
BITTER_END

r = /
    typeaheadResult\(\{\"Q\":\" # match 'typeaheadResult({"Q":"'
    ([[[:alnum:]]\s]+)   # match letters, digits and spaces in capture group 1
    \",\"R\":            # match string
    (?:                  # begin non-capture group
      \[\[\"             # match 2 left brackets and a double quote
      ([[[:alnum:]]\s]+) # match > 0 letters, digits and spaces in capture group 2
      |                  # or
      (\[\])             # match left then right bracket in capture group 3
    )                    # end non-capture group
    /x                   # free-spacing regex definition mode

str.split(/\n\n+/).map do |s|
  ss = s[r]
  ss = nil unless (( &&  =~ /\A#{}/) || =="[]")
  ss
end.compact
  #=> ["typeaheadResult({\"Q\":\"standing desk Mike\",\"R\":[[\"standing desk",
  #    "typeaheadResult({\"Q\":\"laptop bag\",\"R\":[[\"laptop bag",
  #    "typeaheadResult({\"Q\":\"crapshoot hello\",\"R\":[]"]

如果 </code> 不是 <code>nil 并且 .begins_with() 是 false，您可以考虑标记可能的错误数据。

部分查找单词的正则表达式问题

Regex issue with finding words partially

ruby

regex

rubular