How to Check if a String Contains Other Than ANOTHER CMD in JavaScript

Learn how to efficiently check if a string has unwanted content, excluding specific phrases like `ANOTHER CMD`, using JavaScript.
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How to Check if a String Contains Other Than ANOTHER CMD in JavaScript

In programming, especially when working with strings, one common requirement is to validate the content of a string against certain conditions. A typical scenario might involve checking if a string contains elements that are not part of a specified set of words or phrases. If you've ever faced the need to verify if a string violates this condition, you’re in the right place!

In this post, we'll explore how you can achieve this in JavaScript by excluding specific phrases and sequences of numbers from your checks.

The Problem

You want to determine if a string contains anything other than the specified phrase "ANOTHER CMD" and a set of numbers given as an array, such as ["8809 8805", "8806 8807"]. Your check should pass (return true) if the string contains any other alphabets or numbers that are not part of this specified content.

The Solution

To tackle this problem, we can create a function that will:

Define the array of words/phrases to exclude from the validation.

Iterate through this array and replace any occurrence of those words in the string with an empty string.

Finally, check if the resulting string is empty or contains only whitespace.

Step-by-step Implementation

Here's how you can implement this solution in JavaScript:

Step 1: Define the Excluded Words Array

First, we will create an array that includes the words or phrases we want to mention. In your case, it looks like this:

[[See Video to Reveal this Text or Code Snippet]]

Step 2: Create the Function to Validate the String

Next, we define a function to check the content of the string. This function will do the following:

Loop through the exclusion array.

Use the replaceAll() method to remove instances of those words from the input string.

Trim the string and check if it is empty.

Here’s the complete code for the function:

[[See Video to Reveal this Text or Code Snippet]]

Step 3: Testing the Function

Let’s test the function with different inputs to see if it works correctly:

[[See Video to Reveal this Text or Code Snippet]]

In the first case, the string contains extra content and returns false.

In the second case, after removing the specified phrases and numbers, nothing else remains, returning true.

Conclusion

With this straightforward approach, you can efficiently check if a string contains any unwanted content, excluding specified words or sequences of numbers. This method leverages JavaScript's powerful string manipulation capabilities, making the task easy and quick.

Feel free to adapt this code as needed for your own requirements, and happy coding!