Скачать или смотреть How to Compare a String with an Array in JavaScript While Excluding Partial Matches

Learn how to effectively compare a string with an array in JavaScript, excluding partial matches with the help of regular expressions.
---
This video is based on the question https://stackoverflow.com/q/75582988/ asked by the user 'DTambah' ( https://stackoverflow.com/u/8104098/ ) and on the answer https://stackoverflow.com/a/75583107/ provided by the user 'Mr. Polywhirl' ( https://stackoverflow.com/u/1762224/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: Compare a string and an array, but leave out words not surrounded by whitespaces

Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l...
The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license.

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
Comparing Strings and Arrays in JavaScript: Excluding Partial Matches

When working with strings and arrays in JavaScript, you might come across a situation where you need to compare a string with an array to identify specific words or phrases. In particular, you may want to exclude partial matches—words that are not surrounded by whitespace. This is a common challenge, and in this post, we’ll explore how to tackle this problem effectively.

The Problem at Hand

Imagine you have a string and an array of words or phrases, and you want to find which phrases from the array are present in the string. For instance, given the string:

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

and the array:

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

You want to extract phrases such as "morning", "good", and "good morning", but not the words "go" and "he", as they appear as partial matches within "good" and "hello", respectively.

The Solution Breakdown

To solve this problem, we can utilize regular expressions. Regular expressions allow us to match patterns efficiently. Here’s how you can do it:

Step 1: Utilize Word Boundaries

By using word boundaries (\b), we can ensure that we only match complete words in our comparisons. Here’s a breakdown of the solution:

Create a Regular Expression: For each phrase in the myArray, generate a regular expression that includes word boundaries.

Ignore Case Sensitivity: By adding a case-ignore flag (i), we make our comparison case insensitive.

Filter the Array: Use the filter method to only include phrases that match the user input.

The Code Implementation

Here's how our JavaScript code would look to accomplish this:

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

Live Input Evaluation

To make this even more interactive, let’s implement live input evaluation with a debounce function to improve performance:

JavaScript Code:

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

HTML Code:

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

Conclusion

In summary, comparing a string with an array while excluding partial matches can be effectively achieved using regular expressions in JavaScript. By applying word boundaries and considering case sensitivity, you can accurately filter and retrieve the desired phrases from your input.

Feel free to experiment with this approach in your own projects, whether you're building a text analysis tool or enhancing user experience on a web application.