如何知道一個字符串是否至少包含 Javascript 中的一個數組元素

Question

let theString = 'include all the information someone would need to answer your question'

let theString2 = 'include some the information someone would need to answer your question'

let theString3 = 'the information someone would need to answer your question'

let theArray = ['all', 'some', 'x', 'y', 'etc' ]

theString 為真，因為有 'all'，theString2 為真，因為有 'some'，theString3 為假，因為沒有 'all' 或 'some'

Answer 1

const theStringIsGood = theString.split(' ').some(word => theArray.includes(word))

此代碼將句子拆分為每個單詞，並檢查是否有任何單詞與匹配集 theArray 匹配。

Answer 2

您可以使用 string.includes() 方法。 但在這種情況下， theString3 仍然會返回 true，因為 some 在某事中。 您可以創建一個輔助函數來查看字符串是否在數組中：

function findString(arr, str) {
    let flag = false;
    let strArr = str.split(' ');
    arr.forEach(function(s) {
        strArr.forEach(function(s2) {
            if(s === s2) {
                flag = true;
            }
        });
    });
    return flag;
};

現在您可以將數組和字符串之一傳遞給函數並對其進行測試。

Answer 3

你可以用正則表達式簡單地做到這一點：

function ArrayInText(str, words) {
    let regex = new RegExp("\\b(" + words.join('|') + ")\\b", "g");
    return regex.test(str);
}

在正則表達式中 \\b 是單詞邊界

請注意，如果您自己拆分所有字符串並逐個檢查，則會占用大量內存，因為這是一種貪婪的解決方案。 我提供使用 javascript 本機函數的方法。

片段：

 let theString = 'include all the information someone would need to answer your question' let theString2 = 'include some the information someone would need to answer your question' let theString3 = 'the information someone would need to answer your question' let theArray = ['all', 'some', 'x', 'y', 'etc'] function ArrayInText(str, words) { let regex = new RegExp("\\\\b(" + words.join('|') + ")\\\\b", "g"); return regex.test(str); } console.log(ArrayInText(theString, theArray)); console.log(ArrayInText(theString2, theArray)); console.log(ArrayInText(theString3, theArray));

祝你好運 ：）

Answer 4

1) isIncludeWord -- 使用split和includes方法查找精確的單詞匹配。
2) isInclude - 使用some和includes查找匹配包含。

 let theString = "include all the information someone would need to answer your question"; let theString2 = "include some the information someone would need to answer your question"; let theString3 = "the information someone would need to answer your question"; let theArray = ["all", "some", "x", "y", "etc"]; const isIncludeWord = (str, arr) => str.split(" ").reduce((include, word) => include || arr.includes(word), false); const isInclude = (str, arr) => arr.some(item => str.includes(item)); console.log(isIncludeWord(theString, theArray)); console.log(isIncludeWord(theString2, theArray)); console.log(isIncludeWord(theString3, theArray)); console.log(isInclude(theString, theArray)); console.log(isInclude(theString2, theArray)); console.log(isInclude(theString3, theArray));