MentalGear

// Note: Does only work with primities (numbers, strings) as objects/arrays, etc are saved by reference
// meaning even if the object is the same twice, the reference will be different and Set() will not have unique true values
// this could maybe be fixed by JSON.stringifying non-primitive values on save
export function mergeDedupeArrays(arrays) {
  let combinedArrays = []

  for (let array of arrays) {
    combinedArrays = combinedArrays.concat(array)
  }
  return [...new Set(combinedArrays)]

MentalGear

// based upon:
// https://docs.microsoft.com/en-us/dotnet/standard/base-types/how-to-extract-a-protocol-and-port-number-from-a-url
const url = 'http://www.google.com/fwef://gerg';
const regex = /^(?<proto>\w+):/g;
const found = url.match(regex);
    
 console.log(found);