Nodejs Array Same same_values(arr)

Method Source Code

function findMissing(arr1, arr2){
  
  if((arr1.length) && (arr2.length) === 0){
    return 0;//from ww  w  .  j  a  va  2  s  .  c  o  m
  }
  
  if(arr1.same_values(arr2)){
    return 0;
  }
  
  for(num = 0; num < arr2.length; num++){
    if(isInArray(arr2[num], arr1) !== true) return arr2[num];
  }
  
}

Array.prototype.same_values = function(arr) {
    if (this.length != arr.length) return false;
    for (var i = 0; i < arr.length; i++) {
        if (this[i].same_values) { //To test values in nested arrays
            if (!this[i].same_values(arr[i])) return false;
        }
        else if (this[i] !== arr[i]) return false;
    }
    return true;
};

function isInArray(value, array) {
  return array.indexOf(value) > -1;
}

Related

1. same()

   Array.prototype.same = function() {
       for(var i = 1; i < this.length; i++) {
           if(this[i] !== this[0])
               return false;
       return true;
   

2. same(comparisons, unordered)

   Array.prototype.same = function(comparisons, unordered) {
       if (Object.prototype.toString.call(this) !== '[object Array]') {
           throw new TypeError("`this` must be Array, not " + typeof this);
       var arglen = arguments.length;
       if (arglen < 1) {
           throw new TypeError("`arguments` must have at least one comparison `Array`");
       var firstarg = arguments[0];
   ...
   

3. same(obj)

   Array.prototype.same = function(obj) { 
       var i = this.length;
       while (i--) {
           if (obj.contains(this[i])) {
       return false;
   };
   

4. sameElementCount(arr)

   Array.prototype.sameElementCount = function(arr) {
     var result = [], count = null;
     arr.sort();
     for (var i = 0; i < arr.length;) {
       count = 1;
       for (var j = i + 1; j < arr.length; j++) {
         if (arr[i] == arr[j]) {
           count++;
       result.push([ arr[i], count ]);
       i += count;
     return result;
   };