使用javascript在两个字符之间获取子字符串

I am trying to extract a string from within a larger string where it get everything inbetween a ':' and a ';'.

我正在尝试从一个更大的字符串中提取一个字符串，在这个字符串中，它可以得到“:”和“;”之间的所有信息。

Current

当前的

Str = 'MyLongString:StringIWant;'

Desired Output

期望输出值

newStr = 'StringIWant'

10 个解决方案

#1

You can try this

你可以试试这个

var mySubString = str.substring(
    str.lastIndexOf(":") + 1, 
    str.lastIndexOf(";")
);

#2

You can also try this:

你也可以试试这个:

var str = 'one:two;three';    
str.split(':').pop().split(';').shift(); // returns 'two'

#3

Use split()

使用分割()

var s = 'MyLongString:StringIWant;';
var arrStr = s.split(/[:;]/);
alert(arrStr);

arrStr will contain all the string delimited by : or ;
So access every string through for-loop

arrStr将包含由:或分隔的所有字符串;通过for循环访问每个字符串

for(var i=0; i<arrStr.length; i++)
    alert(arrStr[i]);

#4

@Babasaheb Gosavi Answer is perfect if you have one occurrence of the substrings (":" and ";"). but once you have multiple occurrences, it might get little bit tricky.

@Babasaheb Gosavi的答案是完美的，如果有一个子字符串出现(“:”和“;”)。但是一旦出现了多次事件，就会变得有点棘手。

---

The best solution I have came up with to work on multiple projects is using four methods inside an object.

我想出的最好的解决方案是在一个对象中使用四种方法。

• First method: is to actually get a substring from between two strings (however it will find only one result).
• 第一种方法:实际上是从两个字符串之间获取子字符串(不过它只会找到一个结果)。
• Second method: will remove the (would-be) most recently found result with the substrings after and before it.
• 第二种方法:删除子字符串后和前的最近发现的结果。
• Third method: will do the above two methods recursively on a string.
• 第三个方法:在字符串上递归地执行上述两个方法。
• Fourth method: will apply the third method and return the result.
• 第四种方法:应用第三种方法并返回结果。

---

Code

So enough talking, let's see the code:

说得够多了，让我们看看代码:

var getFromBetween = {
    results:[],
    string:"",
    getFromBetween:function (sub1,sub2) {
        if(this.string.indexOf(sub1) < 0 || this.string.indexOf(sub2) < 0) return false;
        var SP = this.string.indexOf(sub1)+sub1.length;
        var string1 = this.string.substr(0,SP);
        var string2 = this.string.substr(SP);
        var TP = string1.length + string2.indexOf(sub2);
        return this.string.substring(SP,TP);
    },
    removeFromBetween:function (sub1,sub2) {
        if(this.string.indexOf(sub1) < 0 || this.string.indexOf(sub2) < 0) return false;
        var removal = sub1+this.getFromBetween(sub1,sub2)+sub2;
        this.string = this.string.replace(removal,"");
    },
    getAllResults:function (sub1,sub2) {
        // first check to see if we do have both substrings
        if(this.string.indexOf(sub1) < 0 || this.string.indexOf(sub2) < 0) return;

        // find one result
        var result = this.getFromBetween(sub1,sub2);
        // push it to the results array
        this.results.push(result);
        // remove the most recently found one from the string
        this.removeFromBetween(sub1,sub2);

        // if there's more substrings
        if(this.string.indexOf(sub1) > -1 && this.string.indexOf(sub2) > -1) {
            this.getAllResults(sub1,sub2);
        }
        else return;
    },
    get:function (string,sub1,sub2) {
        this.results = [];
        this.string = string;
        this.getAllResults(sub1,sub2);
        return this.results;
    }
};

---

How to use?

Example:

var str = 'this is the haystack {{{0}}} {{{1}}} {{{2}}} {{{3}}} {{{4}}} some text {{{5}}} end of haystack';
var result = getFromBetween.get(str,"{{{","}}}");
console.log(result);
// returns: [0,1,2,3,4,5]

#5

var s = 'MyLongString:StringIWant;';
/:([^;]+);/.exec(s)[1]; // StringIWant

#6

I like this method:

我喜欢这个方法:

var Str = 'MyLongString:StringIWant;';
var tmpStr  = Str.match(":(.*);");
var newStr = tmpStr[1];
//newStr now contains 'StringIWant'

#7

You can also use this one...

你也可以用这个…

function extractText(str,delimiter){
  if (str && delimiter){
    var firstIndex = str.indexOf(delimiter)+1;
    var lastIndex = str.lastIndexOf(delimiter);
    str = str.substring(firstIndex,lastIndex);
  }
  return str;
}


var quotes = document.getElementById("quotes");

// &#34 - represents quotation mark in HTML

<div>


  <div>
  
    <span id="at">
      My string is @between@ the "at" sign
    </span>
    <button onclick="document.getElementById('at').innerText = extractText(document.getElementById('at').innerText,'@')">Click</button>
  
  </div>
  
  <div>
    <span id="quotes">
      My string is "between" quotes chars
    </span>
    <button onclick="document.getElementById('quotes').innerText = extractText(document.getElementById('quotes').innerText,'&#34')">Click</button>
  
  </div>

</div>

#8

I used @tsds way but by only using the split function.

我使用了@tsds方法，但只使用了split函数。

var str = 'one:two;three';    
str.split(':')[1].split(';')[0] // returns 'two'

#9

Try this to Get Substring between two characters using javascript.

尝试使用javascript在两个字符之间获取子字符串。

        $("button").click(function(){
            var myStr = "MyLongString:StringIWant;";
            var subStr = myStr.match(":(.*);");
            alert(subStr[1]);
        });

Taken from @ Find substring between the two characters with jQuery

使用jQuery从@查找两个字符之间的子字符串

#10

Using jQuery:

使用jQuery:

get_between <- function(str, first_character, last_character) {
    new_str = str.match(first_character + "(.*)" + last_character)[1].trim()
    return(new_str)
    }

string

字符串

my_string = 'and the thing that ! on the @ with the ^^ goes now' 

usage:

用法:

get_between(my_string, 'that', 'now')

result:

结果:

"! on the @ with the ^^ goes