als-statistics/lib/table/filter-columns.js

A powerful and lightweight JavaScript library for descriptive statistics, regression, clustering, outlier detection, and noise analysis using a flexible table/column architecture.

function filterColumns(columns, columnFilter) {
   const includeNames = [], excludeNames = [], regexPatterns = [];
   if (Array.isArray(columnFilter)) { // Разделяем фильтры
      columnFilter.forEach(filter => {
         if (typeof filter === 'number') includeNames.push(filter)
         else if (typeof filter === "string") {
            if (filter.startsWith("-")) excludeNames.push(filter.slice(1));
            else includeNames.push(filter);
         } else if (filter instanceof RegExp) {
            regexPatterns.push(filter);
         }
      });
   }

   const columnNames = Object.keys(columns);
   let filteredNames = columnNames;

   if (includeNames.length > 0) filteredNames = includeNames; // Если есть явные имена, берём только их
   else if (regexPatterns.length > 0) { // Если есть regex, фильтруем по ним
      filteredNames = columnNames.filter(name =>
         regexPatterns.some(pattern => pattern.test(name))
      );
   }

   if (excludeNames.length > 0) filteredNames = filteredNames.filter(name => !excludeNames.includes(name)); // Применяем исключения
   return filteredNames;
}

module.exports = filterColumns