Question

'Hello there everyone I'm Bob, I want to say something.'

想象一下，我有这个字符串，我想知道是否有一个函数，你可以给字符串搜索字符串。第一个字符串我就像开始，第二个字符串应该是结束。例如：我给函数“Hello”和“I”提供以下字符串。然后我希望函数将“每个人都”返回给我。

jQuery也会这样做。

Answer 1

您可以使用.indexOf和.substring like so：

var first = str.indexOf("Hello");
var second = str.indexOf("I'm", first + from.length);
var result = str.substring(first + "Hello".length, second);

您当然可以将其提取到函数中：

function between(str, from, to){
    var first = str.indexOf(from);
    var second = str.indexOf(to, first + from.length);
    return str.substring(first + from.length, second);
}
between(yourStr,"Hello","I'm");

或者，您可以延长String.prototype if that's your thing：

String.prototype.between = function(from, to){
    var first = this.indexOf(from);
    var second = this.indexOf(to, first + from.length);
    return this.substring(first + from.length, second);
}
// now this will work
str.between("Hello","I'm"); // " there everyone "

Answer 2

var str = "Hello there everyone I'm Bob, I want to say something.";
var first = "Hello";
var second = "I";

var start = str.indexOf(first)+first.length;
var end = str.indexOf(second);

var subStr= str.slice(start , end);

console.log(subStr) // there everyone

Answer 3

您可以使用正则表达式。

str = "Hello there everyone I'm Bob, I want to say something.";
result = str.match(/Hello(.*?)I/);
alert(result[1]);

*?用于非贪婪的比赛。 http://jsfiddle.net/LV5t3/

Javascript参与字符串直到

3 个答案: