如何用Javascript在字符串中获取一些单词？

Question

我想删除'（*）'之外的所有字符。 如何为结果创建代码？

string = "hello (hi) this (is) my (questions)";
=> "(hi)(is)(questions)"

Answer 1

此正则表达式选择不在（*）\(+\w+\)

之外的字符

Answer 2

使用match（内联评论）

var string = "hello (hi) this (is) my (questions)";

var matches = string.match(/\([^)]*\)/g); //match all those string which begins with ( and end with ) and there is no ) in between

var output = matches ? matches.join( "" ) : ""; //check if there is any match

console.log ( output );

Answer 3

简单的方法是与\((.*?)\)匹配，后者会为您提供匹配的单词数组，然后join使用''

var string = "hello (hi) this (is) my (questions)";
var matched = string.match(/\((.*?)\)/g);
matched = matched.join('');
console.log(matched);