Question

给出如下的全文：

var nation = "Piazza delle Medaglie d'Oro
40121 Bologna
Italy"

一个给定的数组如：

 ["Afghanistan", "Italy", "Albania", "United Arab Emirates"]

我们如何检查整个文字中的 意大利 一词是否在array？

遵循此SO answer这是我尝试过的，但是我得到了False，而{strong> 意大利 出现在array中

  var countries = [];
  $("#usp-custom-3 option").each(function() {
    var single = $(this).text();
    countries.push(single);
    var foundPresent = countries.includes("Piazza delle Medaglie d'Oro 40121 Bologna Italy");
    console.log(foundPresent); 
  });

JsFiddle here

Answer 1

如果您在推送数组时检查它，它甚至更简单，只需检查推送的元素：

const text = " I like Italy";
const nations=[];

function insert(single){
 if( text.includes(single) /*may format single, e.g. .trim() etc*/){
   alert("Nation in text!");
 }
 nations.push(single);
}

Run

如果你仍想每次检查整个数组，嵌套迭代可能会这样做：

let countries = ["Afghanistan", "Italy", "Albania", "United Arab Emirates"];
const text = " I like Italy";

let countriesInText = countries.filter( word => text.includes( word ) );
//["Italy"]

Run

Performance compared to Rajeshs answer

如果您只关心是否，可以使用 .some（）而不是 .filter（）。

Answer 2

由于您需要在数组中搜索包含单词的字符串，因此最好选择使用正则表达式并使用string.match(regex)来获取匹配的单词。

＆＃13;

var nation = `Piazza delle Medaglie d'Oro
40121 Bologna
Italy`;
//var nation = "Piazza delle Medaglie d'Oro 40121 Bologna Italy";
var countries = ["Afghanistan", "Italy", "Albania", "United Arab Emirates"];
var regex = new RegExp(countries.join("|"), "i");
console.log(nation.match(regex))

＆＃13;

Answer 3

var nation = "Piazza delle Medaglie d'Oro 40121 Bologna Italy";
searchStringInArray("Italy", nation);
function searchStringInArray (str, strArray) {
    for (var j=0; j<strArray.length; j++) {
        if (strArray[j].match(str)) return j;
    }
    return -1;
}

Answer 4

此脚本会将var var中的每个单词与您提供的所有数组元素进行比较。我希望这能解决你的问题

<script>
    var nation = "Piazza delle Medaglie d'Oro 40121 Bologna Italy";
    test = nation.split(" ");
    array = ["Afghanistan", "Italy", "Albania", "United Arab Emirates"];
    test.forEach(function (element) {
        array.forEach(function (array_to_compare) {
            if (element == array_to_compare)
                alert("We found that word " + element + " matches in array");
        });
    }, this);
    each()

</script>

Answer 5

$(function () {

    try {
        var nation = "Piazza delle Medaglie d'Oro 40121 Bologna Italy";

        var I = ["Afghanistan", "Italy", "Albania", "United Arab Emirates"]

        for (var index = 0; index < I.length; index++) {
            if (nation.toString().toUpperCase().indexOf(I[index].toString().toUpperCase()) >= 0) {
                console.log(I[index].toString());
            }
        }
    }
    catch (err) {
        console.log(err);
    }
});

尝试这个。

如何检查文本中的任何单词是否在数组中？

5 个答案: