Question

是否可以在javascript的indexOf方法中使用partial / substring匹配？

我有一个String arraylist＆amp;我想在indexOf方法中使用完整字符串的部分文本来获取arraylist中所需字符串的索引号。

var text[]=
0----This text over here $%*&*&*&(()(&$..: matches
1----%#@!$%*&*&*&(()(&$..: text to be matched
2----Where does this %#@!$%*&*&*&(()(&$..: belongs to any type of category
3----There are many %#@!$%*&*&*&(()(&$..: comparators

var index=text.indexOf("Where does this %#@!$%*&*&*&(()(&$..: belongs to any type of category")，而不是上面的行，我想使用类似的东西：

var index=text.indexOf("belongs to any type of category")

我需要根据文本匹配命中得到索引号2，即“这个％＃@！$％＆amp; ＆amp; *＆amp;（（）（＆amp; $ .. ：属于任何类型的类别“ 但是字符串里面的特殊字符的bcz正在使它成为凝灰岩和因为它的一个数组有其他字符串，我正在动态地增加了复杂性。

所以我试图使用.indexOf方法，我们可以在其中传递一个字符串＆amp;它返回索引号，所以我的问题是有一种方法可以传入String的一部分而不是整个字符串＆amp;成功获得索引号2？

Code Tried：

describe('angularjs homepage todo list', function() {
    var index = 'not found';
    var text1 = "";

    it('test', function() {
        var textToFind = "belongs to any type of category";
        for (var i=0;i<10;i++){
        var results_list=element.all(By.xpath("//*[@id='panel']/div/div[2]/span[1]")).get(i).getText().then(function(text) {  
            text1=text1+"\n"+text;
            console.log("promise returned text inside function is "+text1);
            return text1;   
        })
    }
        console.log('Text via global defined variable text1 is ' + text1);
        getIndex(0, text1.length, text1, textToFind);
        console.log('index is ' + index);
    });

    function getIndex(i, max, array, textToFind) {
        if (i < max) {
            console.log('text[' + i + '].indexOf = ' + array[i].indexOf(textToFind))
            if (array[i].indexOf(textToFind) > 0) {
                index = i;
                //The index number will be assigned to the variable index  
                //if indexOf is greater than 0, e.g. 38 was returned on index 2
           } else {
                getIndex(i + 1, max, array, textToFind);
           }
       }
    }
});


 Started
 Started execution of test


 Text via global defined variable text1 is 
 index is not found
 Test Case passed

 promise returned text inside function is ['This text over here $%*&*&*&(()(&$..: matches', 
    '%#@!$%*&*&*&(()(&$..: text to be matched',
    'Where does this %#@!$%*&*&*&(()(&$..: belongs to any type of category',
'There are many %#@!$%*&*&*&(()(&$..: comparators']

 1 spec, 0 failures
 Finished in 58.462 seconds


 [18:35:47] I/launcher - 0 instance(s) of WebDriver still running
 [18:35:47] I/launcher - internet explorerANY #01 passed

Answer 1

我需要完全更新答案：

describe('testing', function() {
    var index = 'not found';
    var text1 = [];

    it('should push element to array', function() {
        browser.ignoreSynchronization = true;
        browser.get('https://www.w3schools.com/angular/');
        var elm = element(by.id('leftmenuinner')).all(By.css('[target="_top"]'));
        elm.count().then(function(count) {
            pushToArray(0, count, elm);
        })

    });

    it('should identify index', function() {
        var textToFind = "Data Binding";
        getIndex(0, text1.length, text1, textToFind);
        console.log('Text via global defined variable text1 is ' + text1);
        console.log('index is ' + index);
    });

    function getIndex(i, max, array, textToFind) {
        if (i < max) {
                console.log('text[' + i + '].indexOf = ' + array[i].indexOf(textToFind))
                    if (array[i].indexOf(textToFind) > 0) {
                        index = i;
                        //The index number will be assigned to the variable index  
                        //if indexOf is greater than 0, e.g. 38 was returned on index 2
                } else {
                        getIndex(i + 1, max, array, textToFind);
                }
        }
    }

    function pushToArray(i, max, elm) {
        if (i < max) {
            elm.get(i).getText().then(function(tmpText) {
                console.log(tmpText);
                text1.push(tmpText);
            })
            pushToArray(i + 1, max, elm);
        }
    }
});

我希望我使用的示例网站与您正在尝试的内容完全吻合如果这样可行，您仍然可以更新它以缩短代码。

使用部分匹配或子字符串来获取索引号

1 个答案: