Helpful Functions

functions.js

//Create the range between two Numbers and return it as an array
function funcNumRange(varArr){
  var numMin = Math.min.apply(null, varArr);
  var numMax = Math.max.apply(null, varArr);
  var arrRange = [];	
  for(var i = numMin; i <= numMax; i++){
    arrRange.push(i);
  }
  return arrRange;
}

// Sum numbers in an array
function funcSumArray(sum, element) {
  return sum + element;
}
//// Call the function
numArraySum = arrArray.reduce(funcSumArray, 0);

//Return true if numNumber if prime; if fales, then return factors
function funcIsPrime(numNumber) {
  var numHalf = Math.floor(numNumber / 2);
  var arrFactors = [];
  for (var i = 2; i <= numHalf; i++) {
    if (numNumber % i === 0) {
      arrFactors.push(i);
    }
  }
  return arrFactors.length === 0;
}

// Return only numbers from a string
const numbersOnly = str.replace(/\D/g, '')

//Return unique values of an array
function onlyUnique(value, index, self) {
  return self.indexOf(value) === index;
 }
arrArg.filter(onlyUnique)

// Initialize an array with zeros
var arrResult = Array.apply(null, Array(9)).map(Number.prototype.valueOf,0);