String Contains Another String Duplicate

Have you ever encountered a situation where you needed to check if one string contains another string duplicate while coding? Understanding how to tackle this scenario is crucial in many programming tasks, and in this article, we're going to explore a practical approach to achieve this in various programming languages.

Let's kick things off by addressing this challenge in the widely used programming language, Python. In Python, you can easily check if a string contains a duplicate of another string by using the `count` method. This method allows you to count the occurrences of a specific substring within a string. By comparing the count of the substring you are looking for with `1`, you can determine if it is a duplicate. Here's a simple code snippet to demonstrate this:

Python

def is_duplicate(string, sub_string):
    return string.count(sub_string) &gt; 1

# Example usage
original_string = "hello world"
sub_string = "lo"
if is_duplicate(original_string, sub_string):
    print(f"The string '{original_string}' contains the duplicate string '{sub_string}'")
else:
    print(f"The string '{original_string}' does not contain the duplicate string '{sub_string}'")

Moving on to JavaScript, we can utilize the `includes` method on a string to check for the existence of a substring within another string. To handle duplicate scenarios, we can combine this method with additional logic to count occurrences similar to Python. Below is a code snippet showcasing this in JavaScript:

Javascript

function isDuplicate(string, subString) {
    return string.split(subString).length &gt; 2;
}

// Example usage
let originalString = "hello world";
let subString = "lo";
if (isDuplicate(originalString, subString)) {
    console.log(`The string '${originalString}' contains the duplicate string '${subString}'`);
} else {
    console.log(`The string '${originalString}' does not contain the duplicate string '${subString}'`);
}

Lastly, let's consider handling this scenario in Java. In Java, you can employ the `indexOf` method to search for the first occurrence of a substring within a string. By manipulating this method along with a loop, you can locate duplicate substrings efficiently. Here's a Java snippet to demonstrate this concept:

Java

public static boolean hasDuplicate(String string, String subString) {
    int index = string.indexOf(subString);
    if (index == -1) return false;
    return string.indexOf(subString, index + 1) != -1;
}

// Example usage
String originalString = "hello world";
String subString = "lo";
if (hasDuplicate(originalString, subString)) {
    System.out.println("The string '" + originalString + "' contains the duplicate string '" + subString + "'");
} else {
    System.out.println("The string '" + originalString + "' does not contain the duplicate string '" + subString + "'");
}

In conclusion, being able to identify duplicate strings within a larger string is a valuable skill during software development. By implementing the techniques outlined in this article across Python, JavaScript, and Java, you can efficiently handle such scenarios in your coding endeavors.

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