如何在javascript中使用匹配函数获取字符串

Question

我试图从*开始使用匹配函数来结束*。我得到一个字符串数组而不是一个字符串。 我的代码是

Str="==Quotes==* We thought that he was going to be -- I shouldn't say this at Christmastime -- but the next messiah.** On [[Barack Obama]]"

regE=/\* \w*/gi
newArr=str.match(regE)
console.log(newArr)

Answer 1

你的正则表达式略有偏差。要匹配两个星号，您需要查找/\*([^*]*)\*/gi：

＆＃13;

＆＃13;

str = "==Quotes==* We thought that he was going to be -- I shouldn't say this at Christmastime -- but the next messiah.** On [[Barack Obama]]";
regE = /\*([^*]*)\*/gi;
newArr = str.match(regE);
console.log(newArr[0]);

＆＃13;

＆＃13;

＆＃13;

请注意， .match() 会返回匹配的数组。为了获得第一个匹配，您只需使用[0]访问第一个索引，如上所述。

希望这有帮助！ ：）

Answer 2

你应该使用：

1. 非贪婪的匹配（尝试匹配尽可能小的字符串）：

str = "==Quotes==* We thought that he was going to be -- I shouldn't say this at Christmastime -- but the next messiah.** On [[Barack Obama]]";
    regE = /\*.*?\*/gi;
    newArr = str.match(regE);
    console.log(newArr[0]);

1. 贪婪匹配（尝试匹配尽可能大的字符串）：

str = "==Quotes==* We thought that he was going to be -- I shouldn't say this at Christmastime -- but the next messiah.** On [[Barack Obama]]";
    regE = /\*.*\*/gi;
    newArr = str.match(regE);
    console.log(newArr[0]);