jQuery Get All Occurrences of a String inside a String

This example demonstrates how to get all the email addresses that appear on the web page. This method is useful if you need to change the email address for a specific page or subsection of the website. Although this is not intended to be used to crawl email addresses from web pages, this is also a possible application scenario. See more jQuery .each examples. i means case insensitive, g means global search, m means multi-line matching

var iframeSrc = 'test.html?param=value&email=noobs@noob.com&moreparams=values';
var emailRegex= /[._a-zA-Z0-9-]+@[._a-zA-Z0-9-]+/igm;

console.log(iframeSrc);
console.log(emailRegex.test(iframeSrc));
console.log(iframeSrc.match(emailRegex));

$.each(iframeSrc.match(emailRegex), function(index, value) { 
     console.log(index + ". " + value);
});
//输出：0. noobs@noob.com

This code looks for all HTML content between <securequery></securequery> tags:

var secureQueryRegex = /(

)/igm;

/ Loop through each query found in the data / $.each(data.match(secureQueryRegex), function(index, value) { console.log(index ". " value); });

// Sample output: // 0. query=find all shops // 1. query=find all locations //etc... Frequently Asked Questions about Finding the Number of Substrings in Strings (FAQ)

How to use jQuery to find all occurrences of substrings in strings?

jQuery itself does not have built-in functions to find all occurrences of substrings in strings. However, you can use JavaScript's match() function with global regular expressions. Examples are as follows:

var string = "Hello, world! Hello, user!";
var substring = "Hello";
var occurrences = string.match(new RegExp(substring, 'g'));

In this code, the g flag represents a global search, which means it will look for all matches, not just the first one.

Can I use the match() function in Python to find where substrings appear in strings?

In Python, you can use the count() function to find all occurrences of a substring in a string. Examples are as follows:

string = "Hello, world! Hello, user!"
substring = "Hello"
occurrences = string.count(substring)

In this code, the count() function returns the number of times a substring appears in the string.

How to find all occurrences of substrings in string list in Python?

You can use the count() function and the for loop to find all occurrences of substrings in a string list. Examples are as follows:

list_of_strings = ["Hello, world!", "Hello, user!", "Goodbye, world!"]
substring = "Hello"
occurrences = [string.count(substring) for string in list_of_strings]

In this code, for loops over each string in the list, and the count() function looks for the number of times a substring appears in each string.

Can I use the match() function in JavaScript to find where substrings appear in strings?

Yes, you can use the match() function in JavaScript to find all occurrences of substrings in a string. However, you need to use this with a global regular expression, as shown in the answer to question 1.

How to find indexes of all occurrences of substrings in strings in JavaScript?

You can use the while loop and indexOf() function to find the index of all occurrences of substrings in a string. Examples are as follows:

var iframeSrc = 'test.html?param=value&email=noobs@noob.com&moreparams=values';
var emailRegex= /[._a-zA-Z0-9-]+@[._a-zA-Z0-9-]+/igm;

console.log(iframeSrc);
console.log(emailRegex.test(iframeSrc));
console.log(iframeSrc.match(emailRegex));

$.each(iframeSrc.match(emailRegex), function(index, value) { 
     console.log(index + ". " + value);
});
//输出：0. noobs@noob.com

In this code, the while loop continues until the indexOf() function returns -1, indicating that the substring cannot be found anymore. The index of the location where the occurrence is stored is stored in the positions array.

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