Nodejs Array In inArray(comparer)

Method Source Code

// check if an element exists in array using a comparer function
// comparer : function(currentElement)
Array.prototype.inArray = function(comparer) {
  for (var i = 0; i < this.length; i++) {
    if (comparer(this[i])) return true;
  }//from  w  ww  .j  a  v a  2  s  . c om
  return false;
};

// adds an element to the array if it does not already exist using a comparer
// function
Array.prototype.pushIfNotExist = function(element, comparer) {
  if (!this.inArray(comparer)) {
    this.push(element);
    return true;
  }
  return false;
};


// find index of object in array given some property value
function arrayObjectIndexOf(myArray, property, searchTerm) {
  for (var i = 0, len = myArray.length; i < len; i++) {
    if (myArray[i][property] === searchTerm) return i;
  }
  return -1;
}

// find index of item in array
function arrayIndexOf(myArray, searchTerm) {
  for (var i = 0, len = myArray.length; i < len; i++) {
    if (myArray[i] === searchTerm) return i;
  }
  return -1;
}

Related

1. inArray()

   Array.prototype.inArray = function() {
       for(var j in this) {
           if(this[j] == arguments[0]) {
               return true;
       return false;
   

2. inArray()

   Array.prototype.inArray = function()
     for (var j in this) { 
       if (this[j] == arguments[0]) { 
         return true;
     return false;     
   

3. inArray(comparer)

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

4. inArray(comparer)

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

5. inArray(comparer)

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

6. inArray(comparer)

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

7. inArray(e)

   Array.prototype.inArray = function(e) {
       for (var i in this){
           if (this[i]===e) return true;
       return false;
   

8. inArray(e)

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

9. inArray(element)

   Array.prototype.inArray = function (element) {
     for (var i = 0; i < this.length; i++) {
       if (this[i] == element) {
         return i;
     return -1;
   };