Скачать или смотреть How to Print a Hierarchical Tree Structure in JavaScript

Learn how to create a hierarchical tree structure in JavaScript from an array of file paths, including tips for better implementation.
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This video is based on the question https://stackoverflow.com/q/65316535/ asked by the user 'Magikly Delishis' ( https://stackoverflow.com/u/13266645/ ) and on the answer https://stackoverflow.com/a/65330241/ provided by the user 'trincot' ( https://stackoverflow.com/u/5459839/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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How to Print a Hierarchical Tree Structure in JavaScript

Creating a hierarchical tree structure from an array of strings can be tricky, especially if your implementation doesn't recognize existing nodes correctly. If you've been struggling with this, you're not alone!

The Problem

Suppose you have an array of file paths, such as:

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

You want to represent this in a structured tree format, but your current implementation adds a node redundantly instead of recognizing existing nodes. The resulting structure may look jumbled, like this:

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

Clearly, this is not the desired outcome. Instead, you might want:

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

Identifying the Issues

Upon examining your code, there are a few critical issues affecting your tree representation:

Using .includes() Incorrectly: This method does not work for checking object equivalence properly in this context. Instead, use .find() to locate existing nodes.

Wrong Index Assignment: Attempting to use .indexOf() to set the current node (cur) is misleading since it provides an index rather than the actual node.

Improper Path Parsing: The use of .shift() can inadvertently omit necessary path segments. Instead, use .match() to directly grab meaningful parts.

Minor Considerations

While these issues could be considered less urgent, they still enhance code clarity and performance:

You don't need to declare cur outside the outer loop.

Simplify the space creation with the native .repeat() function, rather than a custom function.

Create new nodes conditionally to prevent unnecessary object instantiation.

Array.prototype.reduce() provides better scope handling for variables compared to nested loops.

The Improved Solution

Here is the refined code implementing the earlier suggestions:

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

Conclusion

By implementing these changes, you should be able to represent your file paths as a correctly structured tree. Remember, proper node handling eliminates redundancy and allows for an elegant visualization of your data structure!

Happy coding, and may your trees be ever balanced!