检查字符串是否以多个字符结尾 [英] Check if string ends with any of multiple characters

问题描述

我如何检查字符串是否以多个字符中的任何一个结尾？目前，此代码返回false，即使字符串以问号结尾。如果字符串以句点，感叹号或问号结束，则正常工作的代码将返回true，如果其最后一个字符是其他任何字符，则返回false。

显然我可以独立检查这些条件但是假设我有一个很长的清单，肯定有更好的方法吗？

< pre class =snippet-code-js lang-js prettyprint-override> function myFunction（）{var str =Hello？; var n = str.endsWith（。，！，？）; document.getElementById（demo）。innerHTML = n;}

 < button onclick =myFunction（）>试一试< / button>< p id =demo>< / p>  

解决方案

endsWith 只是没有多个字符串进行测试。您可以定义它们的数组并使用 endsWith 检查每个值：

  function endsWithAny（suffixes，string）{
 return suffixes.some（function（suffix）{
 return string.endsWith（suffix）; 
}）; 
} 
 
函数myFunction（）{
 var str =Hello？; 
 var n = endsWithAny（[。，！，？]，str）; 
 document.getElementById（demo）。innerHTML = n; 
} 
  

或者使用正则表达式进行一次性付款：

  var n = /[.!?]$/.test(str）; 
  

How would I check to see if a string ends in any one of multiple characters? Currently this code returns false, even though the string ends in a question mark.The properly working code would return true if the string ends in either a period, exclamation mark, or question mark, and return false if its last character is anything else.

Obviously I could check these conditions independently but suppose I had a very long list, surely there is a better way?

function myFunction() {
    var str = "Hello?";
    var n = str.endsWith(".", "!", "?");
    document.getElementById("demo").innerHTML = n;
}

<button onclick="myFunction()">Try it</button>

<p id="demo"></p>

解决方案

endsWith just doesn’t take multiple strings to test. You could define an array of them and check each value with endsWith:

function endsWithAny(suffixes, string) {
    return suffixes.some(function (suffix) {
        return string.endsWith(suffix);
    });
}

function myFunction() {
    var str = "Hello?";
    var n = endsWithAny([".", "!", "?"], str);
    document.getElementById("demo").innerHTML = n;
}

Or use a regular expression for a one-off:

var n = /[.!?]$/.test(str);

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