Nodejs Array Index indexOfByKey(aKey)

Method Source Code

Array.prototype.indexOfByKey = function(aKey) {
    for(var i = 0; i < this.length; i++) // go up because we want first hit
        if(this[i].getKey() === aKey)
            return i;
            //from w  w w  . ja v  a 2s  .  c  om
    return -1;
};

Related

1. index(val)

   Array.prototype.index = function(val) {
     for(var i = 0, l = this.length; i < l; i++) {
       if(this[i] == val) return i;
     return null;
   };
   

2. index(val)

   "use strict";
   Array.prototype.index = function(val) {
     for(var i = 0, l = this.length; i < l; i++) {
       if(this[i] == val) return i;
     return null;
   };
   

3. indexOfAttr(attr, value)

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

4. indexOfByFunction(filter)

   Array.prototype.indexOfByFunction = function (filter) {
       return indexOfByFunction(this, filter);
   };
   

5. indexOfById(id)

   Array.prototype.indexOfById = function(id){
     var index = -1,
       i = 0,
       l = this.length,
       item;
     for(; l--; i++){
       item = this[i];
       if(parseInt(item.id) === id)
         return i;   
   ...
   

6. indexOfByProp(obj, property)

   Array.prototype.indexOfByProp = function(obj, property) {
     let result = -1;
     this.forEach(function(currentObj, index) {
       if (currentObj[property] === obj[property]) {
         result = index;
     });
     return result;
   };
   ...
   

7. indexOfContent(searchTerm)

   Array.prototype.indexOfContent = function (searchTerm) {
     let index = -1;
     for (var i = 0, len = this.length; i < len; i++) {
       if (this[i].content == searchTerm) {
         index = i;
         break;
     return index
   ...
   

8. indexOfElement(search, func)

   Array.prototype.indexOfElement = function(search, func) {
     for(var i = 0; i < this.length; i++) {
       var result = func(search, this[i]);
       if(result)
          return i;
     return -1;
   

9. indexOfGreatestLessThan(val)

   Array.prototype.indexOfGreatestLessThan = function(val) {
     var minIndex = 0;  
     var minDist = Number.MAX_VALUE;
     for (var i = 0; i < this.length; i++) {
       if ((this[i] <= val) && (Math.abs(this[i] - val) < minDist)) {
         minDist = Math.abs(this[i] - val);
         minIndex = i;
     return minIndex;