Question

给出以下句子：Crazy Fredrick bought many very exquisite opal jewels.，什么正则表达式允许我过滤掉每个其他单词？我正在做这样的替换：

"Crazy Fredrick bought many very exquisite opal jewels.".replace(/regex goes here/gi, "replace string goes here")

所以我想创建一个正则表达式，将该句子转换为Fredrick many exquisite jewels.或crazy bought very opal。

Answer 1

可以使用以下内容（假设您的单词都与\ w匹配）

"Crazy Fredrick bought many very exquisite opal jewels.".replace(/(\w+) (\w+)/g, '$1');
-> "Crazy bought very opal."

用2美元取代1美元可以获得：

"Fredrick many exquisite jewels."

Answer 2

不确定RegEx是否是正确的工具，但您可以将split字符串按空格分成数组，然后使用filter删除奇数或偶数元素：

var s = "Crazy Fredrick brought many very exquisite opal jewels";

s.split(/\s+/)
    .filter(function (_, index) { 
        return index % 2 !== 0; // only want "odd" words
    }).join(" ");

// yields "Fredrick many exquisite jewels"

Answer 3

不是最佳解决方案，但您可以尝试使用这些正则表达式：

\b\S+\b\s?(?=((\b\S+\b\s?){2})*\.?$)
\b\S+\b\s?(?=\b\S+\b\s?((\b\S+\b\s?){2})*\.?$)

此处的解释和演示：http://regex101.com/r/kR3hS5

什么正则表达式可以取代其他所有单词？

3 个答案: