使用正则表达式从字符串中提取单词

Question

In javascript, I want extract word list ends with 'y'.

code is following,

var str = "Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum.";

str.match(/(\w+)y\W/g);

result is a array

["simply ", "dummy ", "industry.", "industry'", "dummy ", "galley ", "only ", "essentially ", "recently "]

so, my question is, Can I get a word list without 'y' character using regex. the result word list should be like this,

["simpl ", "dumm ", "industr.", "industr'", "dumm ", "galle ", "onl ", "essentiall", "recentl"]

/(\\w+)y\\W/g doesn't work.

Answer 1

您需要所谓的先行断言 ： (?=x)表示此匹配项前面的字符必须与x匹配，但不要捕获它们。

var trimmedWords = wordString.match(/\b\w+(?=y\b)/g);

Answer 2

Here is a way to do it:

var a = [], x;
while (x = /(\w+)y\W/g.exec(str)) {
    a.push(x[1]);
}

console.log(a);
//logs 
["simpl", "dumm", "industr", "industr", "dumm", "galle", "onl", "essentiall", "recentl"]

Answer 3

I think you're looking for \\b(\\w)*y\\b . The \\b is a word separator. The \\w will match any word character, and the y to specify it's ending character. Then you grab the \\w and exclude the y.

* EDIT I semi-take that back. If you're looking for "industr." (with the period included) this will not work. but I'll play around and see what I can come up with.