layonthebeech

function findEvenIndex(arr)
{
  var left = 0, right = arr.reduce(function(pv, cv) { return pv + cv; }, 0);
  for(var i = 0; i < arr.length; i++) {
      if(i > 0) left += arr[i-1];
      right -= arr[i];
      
      if(left == right) return i;
  }
  

layonthebeech

function listSquared (m, n) {
  var matches = [];

  for (var i = m; i <= n; ++i) {
    var sum = getDivisors(i).reduce((sum, n) => sum + n * n, 0);
    var ok = Number.isInteger(Math.sqrt(sum));

    if (ok) {
      matches.push([i, sum]);
    }

layonthebeech

var sum_pairs=function(ints, s){
    var arr = [];
    for(var i = 0; i < ints.length; i++) {
      for(var j = 0; j < ints.length; j++) {
        if(ints[i] + ints[j] === s && j !== i) {
          arr.push(ints[i],ints[j]);
          return arr;
        }
      }
    }

layonthebeech

function isPangram(string){
  string = string.toLowerCase();
  return "abcdefghijklmnopqrstuvwxyz".split("").every(function(x){
    return string.indexOf(x) !== -1;
  });
}

layonthebeech

 arr.forEach(function(x) { counts[x] = (counts[x] || 0)+1; });

layonthebeech

function validate(password) {
  return /^(?=.*\d)(?=.*[a-z])(?=.*[A-Z])[a-zA-Z0-9]{6,}$/.test(password);
} //alphanumeric, one lowercase, one uppercase, one number, 6 or greater length

layonthebeech

function validatePIN(pin) {
  return /^(\d{4}|\d{6})$/.test(pin)
}

layonthebeech

function listToArray(list) {
  var array = [];
  for (var node = list; node; node = node.next)
    array.push(node.value);
  return array;
}

layonthebeech

function SeriesSum(n) {
  for (var s = 0, i = 0; i < n; i++) {
    s += 1 / (1 + i * 3)
  }
  
  return s.toFixed(2)
}

layonthebeech

function sumTwoSmallestNumbers(numbers){  
  numbers = numbers.sort(function(a, b){return a - b; });
  return numbers[0] + numbers[1];
};