非常直截了当。在javascript中,我需要检查字符串是否包含数组中持有的任何子字符串。


当前回答

var str = "A for apple" var subString = ["apple"] console.log (str.includes (subString))

其他回答

我并不是建议你去扩展/修改String的原型,但这是我所做的:

String.prototype.includes ()

String.prototype.includes = function (includes) { console.warn("String.prototype.includes() has been modified."); return function (searchString, position) { if (searchString instanceof Array) { for (var i = 0; i < searchString.length; i++) { if (includes.call(this, searchString[i], position)) { return true; } } return false; } else { return includes.call(this, searchString, position); } } }(String.prototype.includes); console.log('"Hello, World!".includes("foo");', "Hello, World!".includes("foo") ); // false console.log('"Hello, World!".includes(",");', "Hello, World!".includes(",") ); // true console.log('"Hello, World!".includes(["foo", ","])', "Hello, World!".includes(["foo", ","]) ); // true console.log('"Hello, World!".includes(["foo", ","], 6)', "Hello, World!".includes(["foo", ","], 6) ); // false

没有内置的东西可以帮你做这个,你必须为它写一个函数,尽管它可以只是一个对某些数组方法的回调。

有两种方法:

数组一些方法 正则表达式

数组的一些

数组some方法(在ES5中添加)使这非常简单:

if (substrings.some(function(v) { return str.indexOf(v) >= 0; })) {
    // There's at least one
}

更好的箭头函数和newish includes方法(都是ES2015+):

if (substrings.some(v => str.includes(v))) {
    // There's at least one
}

生活例子:

const substrings = ["one", "two", "three"]; let str; // Setup console.log(`Substrings: ${substrings}`); // Try it where we expect a match str = "this has one"; if (substrings.some(v => str.includes(v))) { console.log(`Match using "${str}"`); } else { console.log(`No match using "${str}"`); } // Try it where we DON'T expect a match str = "this doesn't have any"; if (substrings.some(v => str.includes(v))) { console.log(`Match using "${str}"`); } else { console.log(`No match using "${str}"`); }

正则表达式

如果你知道字符串不包含任何正则表达式中的特殊字符,那么你可以欺骗一下,像这样:

if (new RegExp(substrings.join("|")).test(string)) {
    // At least one match
}

...这将创建一个正则表达式,它是您正在寻找的子字符串的一系列更改(例如,one|two),并测试是否有匹配它们中的任何一个,但如果任何子字符串包含正则表达式中的任何特殊字符(*,[等),您必须首先转义它们,您最好只做无聊的循环。有关如何逃离它们的信息,请参阅这个问题的答案。

生活例子:

const substrings = ["one", "two", "three"]; let str; // Setup console.log(`Substrings: ${substrings}`); // Try it where we expect a match str = "this has one"; if (new RegExp(substrings.join("|")).test(str)) { console.log(`Match using "${str}"`); } else { console.log(`No match using "${str}"`); } // Try it where we DON'T expect a match str = "this doesn't have any"; if (new RegExp(substrings.join("|")).test(str)) { console.log(`Match using "${str}"`); } else { console.log(`No match using "${str}"`); }

convert_to_array = function (sentence) {
     return sentence.trim().split(" ");
};

let ages = convert_to_array ("I'm a programmer in javascript writing script");

function confirmEnding(string) {
let target = "ipt";
    return  (string.substr(-target.length) === target) ? true : false;
}

function mySearchResult() {
return ages.filter(confirmEnding);
}

mySearchResult();

您可以像这样检查并使用过滤器返回匹配单词的数组

这太迟了,但我刚刚遇到了一个问题。在我自己的项目中,我使用以下方法来检查字符串是否在数组中:

["a","b"].includes('a')     // true
["a","b"].includes('b')     // true
["a","b"].includes('c')     // false

通过这种方式,你可以获取一个预定义数组并检查它是否包含字符串:

var parameters = ['a','b']
parameters.includes('a')    // true

你可以这样检查:

<!DOCTYPE html>
<html>
   <head>
      <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script>
      <script>
         $(document).ready(function(){
         var list = ["bad", "words", "include"] 
         var sentence = $("#comments_text").val()

         $.each(list, function( index, value ) {
           if (sentence.indexOf(value) > -1) {
                console.log(value)
            }
         });
         });
      </script>
   </head>
   <body>
      <input id="comments_text" value="This is a bad, with include test"> 
   </body>
</html>