using-tidyjs

To structure a tidyjs pipeline correctly, use the tidy(data, ...verbs) pattern so verbs are composed properly rather than called incorrectly as standalone methods on arrays.

Your tidyjs mutate function produces incorrect data because you are likely using summary or vector functions inside it; use mutateWithSummary for vector operations or summarize for summary functions to avoid silent logic bugs.

Use mutateWithSummary instead of mutate in tidyjs when you need to apply vector operations that require access to aggregated or summary data across the entire dataset during the transformation step.

To reference object fields correctly in tidyjs, use idiomatic accessor functions for field references and proper selectors usage within functions like select() and pivotLonger({ cols: ... }).

Common tidyjs data wrangling gotchas include using summary functions inside mutate, bypassing the tidy() pipeline structure, and using incorrect accessor conventions for field references, which cause silent logic bugs.

Yes, you can use tidyjs for pivoting and joining arrays of objects in JavaScript by following the correct pipeline structure and applying proper selectors within pivot operations and join verbs to transform data accurately.