In this tutorial, we’ll review several ways of checking if aStringcontains a substring, and we’ll compare the performance of each. 2.String.indexOf Let’s first try using theString.indexOfmethod.indexOfgives us the first position where the substring is found, or -1 if it isn’t found...
if(string.toUpperCase().indexOf(search.toUpperCase()) !== -1){ alert('Our string contains the string: ' + search); } In the example above, we converted both strings to uppercase before we performed our substring search. If you run this example, you will see that the output is: Our ...
if(stristr($string, $substring)){ echo 'Our string contains: ' . $substring; } In the PHP code above, we were able to confirm that our string contains the substring “this”. As you can see, thestristrfunction takes in two parameters: $haystack: This is the string that we want to ...
To check if a string contains a substring using String.includes() in JavaScript: Call the String.includes() method on the string. Pass the substring as a parameter, e.g. String.includes(substr). The String.includes() method returns true if the substring is contained in the string. ...
Using regular expression test method, we can verify if a string contains a substring or not. We have to create a regular expression for the substring and then test it using the target string. var actualstring = "RegExp test method"; var regexp = /test/; regexp.test(actualstring)...
Checking if a string contains a substring is a task that comes up often when you are using any programming language, and if you’re trying to figure out how to do that inPython, you’re in luck. You have many options to check if a Python string contains a substring. ...
2.1. Native contains Method First, using core Kotlin support, we can use the contains method that returns true or false depending on if the substring is contained in the string object that is calling: @Test fun `given a string when search for contained substrings then should return true`()...
Another way to check if a string contains a substring in Python is by using thefind()method. It returns the index of the first occurrence of the substring within the string. If the substring is not found, it returns -1. Here’s an example: ...
1. String.contains() Method The first and most popular method used in Java for checking if a string contains another string is contains() from the String class. This method returns a boolean value based on whether the substring exists in the this string or not. The contains() method search...
Get Your Code:Click here to download the free sample codethat you’ll use to check if a string contains a substring. Take the Quiz:Test your knowledge with our interactive “How to Check if a Python String Contains a Substring” quiz. You’ll receive a score upon completion to help you...