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const myFilter = products.filter(el => (el.name.toLowerCase().includes(filterText.toLowerCase()) && (inStockOnly ? el.stocked : true) || (!inStockOnly))); const finalList = myFilter.reduce((a, c) => { const isDifferentCategory = c.category !== a.lastCategory; a.output = [...a.output,isDifferentCategory && <ProductCategoryRow key={c.category} category={c.category} />, <ProductRow key={c.name} product={c} /> ]; a.lastCategory = isDifferentCategory ? c.category : a.lastCategory; return a; }, { lastCategory: null, output: [] }); console.log(finalList);
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