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Discover how to use C# Regex to effectively split expressions by multiple closing brackets and control line length for better readability.
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This video is based on the question https://stackoverflow.com/q/66383136/ asked by the user 'Chris Laurie' ( https://stackoverflow.com/u/12524274/ ) and on the answer https://stackoverflow.com/a/66383605/ provided by the user 'buddemat' ( https://stackoverflow.com/u/14015737/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Mastering C# Regex: Split By Multiple Closing Brackets Sets

When working with complex expressions in C# , especially ones that involve multiple closing brackets, it can sometimes become challenging to split or format them correctly. A typical problem might involve dealing with expressions that aren't displaying in a tidy manner, such as splitting after parentheses or ensuring that line lengths are appropriate. In this post, we'll explore how to achieve this using C# Regex.

The Problem

Let’s consider a source expression:

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When using a basic regex pattern, such as (?<=)\s, the results may lead to single closing brackets appearing on their own lines, disrupting the expression's readability. A proper output would maintain the nested structure neatly, like so:

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

In addition to this formatting issue, another requirement is to split lines that exceed a specific length (50 characters) at the last comma before hitting that length limit.

The Solution

To accomplish these goals with C# Regex, let's break down the steps involved:

1. Excluding Unwanted Spaces

To address the first issue of having single closing brackets on a new line, you can modify your initial regex pattern by adding a negative lookahead. This will prevent a whitespace character from being replaced if it's followed by another closing parenthesis. Here’s the regex pattern you can use:

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2. Splitting Lines at 50 Characters

The second aspect of your requirement is to ensure lines do not exceed 50 characters. For this, we can implement a simple solution to search for commas and split the line accordingly. Here’s how you can approach it:

Iterate through the resulting lines generated by your regex.

For each line, check if its length exceeds 50 characters.

If it does, use a regex to find the last comma before the 50-character limit, and insert a line break there.

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Example Code

Here’s a simplified code example demonstrating how to implement both solutions in a C# context:

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Conclusion

By utilizing the powerful features of C# Regex, you can successfully split complex expressions involving multiple closing brackets while maintaining clean formatting. Additionally, controlling the length of each line enhances readability, ensuring that your code remains manageable.

If you're facing any issues with regex patterns in C# , don’t hesitate to explore or ask for more personalized solutions. Happy coding!