Mirror#12
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| let directories = ['.']; | ||
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| args.forEach((arg) => { | ||
| if (arg === '-1') { | ||
| // -1 is the default behavior, so no action needed | ||
| } else if (arg === '-a') { | ||
| options.all = true; | ||
| } else { | ||
| directories = [arg]; | ||
| } | ||
| }); |
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In main, directories is initialized as an array (['.']), and its name suggests you may handle multiple directories. However, in the argument parsing you overwrite it with a new single-element array (directories = [arg];) instead of accumulating, so despite the plural name only one directory is ever kept. For someone reading the code, the plural name might suggest multi-directory support that is not actually there. Would a name that better reflects the current behavior (single directory) or, alternatively, changing the parsing to truly support multiple directories, make it clearer what the code is doing?
| if (!options.all && file.name.startsWith('.')) { | ||
| return; // Skip hidden files unless -a is specified | ||
| } |
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On this line the code comment explains that hidden files are skipped unless -a is specified. Because the if condition (!options.all && file.name.startsWith('.')) already expresses that behavior quite clearly, the comment is mostly repeating what the code says. When comments just restate the obvious logic, they can become noise and may fall out of sync with the code later.
How might you decide when a comment is adding extra context ("why" we do something) versus just narrating the "what" that the code already shows? In this case, could the code be clear enough without the comment, or would renaming options.all to something like includeHidden make it even more self-explanatory so no comment is needed?
| if (arg === '-1') { | ||
| // -1 is the default behavior, so no action needed | ||
| } else if (arg === '-a') { |
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The comment here explains that -1 is the default behavior and therefore no action is taken in the if block. Since the block is intentionally empty, the comment is trying to justify that, but it also mirrors the logic in a way the code could potentially express on its own.
One thing to think about: could the intent be made clear enough through the structure of the code (for example, by handling -1 together with other flags in a way that doesn't require a no-op branch), so that an explanatory comment becomes unnecessary? When you see yourself writing comments to explain an empty or no-op branch, is there a way to simplify or restructure the code so its intent is obvious without extra text?
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