/**
* Array utilities to reduce code duplication
*/
/**
* Remove duplicate items from array and optionally limit results
* Replaces common pattern: [...new Set(items)].slice(0, limit)
*/
export function deduplicateAndLimit<T>(items: T[], limit?: number): T[] {
const unique = [...new Set(items)];
return limit ? unique.slice(0, limit) : unique;
}
/**
* Remove duplicate items from array
* Replaces common pattern: [...new Set(items)]
*/
export function deduplicate<T>(items: T[]): T[] {
return [...new Set(items)];
}
/**
* Limit array to specified number of items
* Safe slice operation with bounds checking
*/
export function limitItems<T>(items: T[], limit: number): T[] {
return limit > 0 ? items.slice(0, limit) : items;
}
/**
* Remove empty or null/undefined items from array
* Common pattern in suggestion filtering
*/
export function filterTruthy<T>(items: (T | null | undefined)[]): T[] {
return items.filter((item): item is T => Boolean(item));
}
/**
* Join array items with separator, filtering empty values
* Common pattern in diagnostic report building
*/
export function joinFiltered(
items: (string | null | undefined)[],
separator = '\n'
): string {
return filterTruthy(items).join(separator);
}
