Nodejs Array Any Predicate any(p)

Method Source Code

// [-1, 2, 3].any(isGreaterThanZero) => true
// [-1, -2, -3].any(isGreaterThanZero) => false
Array.prototype.any = function (p) {
    var count = 0
    for (var i = 0 ; i < this.length ; i++) {
      currentIndex = this[i]/* ww  w.  j  a v  a2  s  .  com*/
      if (p(currentIndex) === true) {
        console.log(p(currentIndex),"true is true")
        count +=1 
      };
    }
    if (count > 0) {
      return true
    }
    return false
};

// OR

Array.prototype.any = function (p) {
  return this.filter(p).length > 0;
};

Related

1. any()

   Array.prototype.any = function(){
     return(this.length > 0);
   };
   

2. any()

   Array.prototype.any = function () {
     return this.length > 0;
   

3. any(conditionFunction)

   Array.prototype.any = function(conditionFunction) {
       try {
           this.each(function(element) {
               if (conditionFunction(element)) {
                   throw 'found!';
           });
           return false;
       } catch(e) {
   ...
   

4. any(delegate)

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

5. any(func)

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

6. any(p)

   Array.prototype.any = function(p) {
       var count = 0
       for (var i = 0; i < this.length; i++) {
           currentIndex = this[i]
           if (p(currentIndex) === true) {
               console.log(p(currentIndex), "true is true")
               count += 1
           };
       if (count > 0) {
           return true
       return false
   };
   function isGreaterThanZero(num) {
       return num > 0;
   function isLessThanZero(num) {
       return num < 0;
   

7. any(p)

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

8. any(p)

   Array.prototype.any = function (p) {
     for(var i = 0; i < this.length; i++){
       if(p(this[i])) return true;
     return false;
   };
   function isGreaterThanZero (num) {
     return num > 0;
   function isLessThanZero (num) {
     return num < 0;
   console.log([-1, 2, 3].any(isGreaterThanZero)); 
   console.log([-1, -2, -3].any(isGreaterThanZero)); 
   

9. any(p)

   Array.prototype.any = function (p) {
    return this.filter(p).length > 0;
   };