als-statistics/lib/utils/get-type.js

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

function getType(values=[]) {
   if (!Array.isArray(values)) throw new Error("Input must be an array");
   let type = Number;
   for(let v of values) {
      if(typeof v === 'number') {
         if (!Number.isFinite(v) || isNaN(v)) throw new Error("All elements in the array must be finite valid numbers");
         continue
      }
      type = String
      break;
   }
   return type
}

module.exports = getType