Nodejs Array All Predicate all(p)

Method Source Code

// Create three functions that one needs to be able to call upon an array
// All: This function returns true only if the predicate supplied returns true for all the items in the array
// None: This function returns true only if the predicate supplied returns false for all the items in the array
// Any: This function returns true if at least one of the items in the array returns true for the predicate supplied

Array.prototype.all = function (p) {
  for (i = 0; i < this.length; i++)
    if (!p(this[i])) return false;
  return true;/*from w w w.  j a v  a 2 s .  c o  m*/
};

Related

1. all(p)

   Array.prototype.all = function (p) {
     for (var i = 0 ; i < this.length ; i++) {
       currentIndex = this[i]
       if (p(currentIndex) === false) {
         return false
       };
     return true
   };
   ...
   

2. all(p)

   Array.prototype.all = function(p) {
       for (var i = 0; i < this.length; i++) {
           currentIndex = this[i];
           if (p(currentIndex) === false) {
               return false;
           return true;
       };
   };
   ...
   

3. all(p)

   Array.prototype.all = function (p) {
   if(this.length == 0){
       return true;
   for(var i=0;i<this.length;i++){
       if(p(this[i]) === false){
         break;
       else
   ...
   

4. all(p)

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

5. all(p)

   Array.prototype.all = function (p) {
    return this.filter(p).length == this.length;
   };
   

6. all(p)

   Array.prototype.all = function (p) {
     for(let el of this){
       if(!p(el)) {return false;}
     return true;
   };
   

7. all(p)

   Array.prototype.all = function (p) {
     return (this.filter(p).length === this.length);
   };
   Array.prototype.none = function (p) {
     return (this.filter(p).length === 0);
   };
   Array.prototype.any = function (p) {
     return (this.filter(p).length > 0);
   };
   ...
   

8. all(p)

   Array.prototype.all = function (p) {
     for (var i = 0; i <this.length; i++){
       if (p(this[i]) === false){
         return false;
     return true;
   };
   

9. all(predicate)

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