如何（从文）开始，字符串

Question

末（文本）如何搜索词并开始使用它的字符串，并寻找另一个词结束的字符串，例如：

var string = "Hello whole world"; 

先从“你好”，并与“世界”结束

所以这将是：

var string = " whole "; 

希望我的问题是清楚的

Answer 1

function findBetween(text, start, end) { 
    var startIndex = text.indexOf(start); 
    var endIndex = text.lastIndexOf(end); 

    if (startIndex === -1) { 
     throw new Error("Start string not found."); 
    } else if (endIndex === -1) { 
     throw new Error("End string not found."); 
    } 

    startIndex += start.length; 

    if (startIndex > endIndex) { 
     throw new Error("Start found after end!"); 
    } 

    return text.substring(startIndex, endIndex); 
} 

console.log(findBetween("Hello whole world", "Hello", "world")); 

// Output: 
// whole 

Answer 2

var text = "Hello whole world"; 
 
var re = /^\w+\s+(.*)\s+\w+$/; 
 
var result = re.exec(text); 
 
alert(result[1]);