Nodejs Array Object Key objectIndex(key,value)

Method Source Code

Array.prototype.objectIndex = function(key,value) {
  for(var i = 0, len = this.length; i < len; i++) {
      if (this[i][key] === value) return i;
  }/*  www. j a v  a2  s .c om*/
  return -1;
}

Related

1. getKeys()

   Array.prototype.getKeys = function(){
     var keys = '';
     for(var i in this) keys += ',' + i;
     return keys.substr(1).split(',');
   

2. hasKey()

   Array.prototype.hasKey = function(){ 
     for(i in this){ 
       if(i === arguments[0]) 
         return true; 
     }; 
     return false; 
   };
   

3. hasMultipleByKey(key)

   Array.prototype.hasMultipleByKey = function(key) {
       var foundOnce = false;
       var i = this.length - 1;
       while (i >= 0) {
           if (this[i].getKey() === key) {
               if (foundOnce)
                   return true;
               else
                   foundOnce = true;
   ...
   

4. keys()

   Array.prototype.keys = function keys () {
     return new ArrayIterator(this, 'key');
   };
   

5. notIn( key, array )

   Array.prototype.notIn = function( key, array )
       return this.filter( function(element)
           var flag = true;
           for(var i = 0; i < array.length; i++)
               if( element[key] == array[i][key]) flag = false;
           return flag;
       });
   };
   

6. options(textKey, valueKey)

   Array.prototype.options = function(textKey, valueKey) {
     var options = [];
     options = this.map(function(item) {
        return { text: item[textKey], value: item[valueKey] }
     });
     return options;
   

7. updateObject(id, key, value_key, value)

   Array.prototype.updateObject = function (id, key, value_key, value) {
     for (var i = 0; i < this.length; i++) {
       if (this[i][key] == value) {
         return this[i][value_key] = value;
   };
   

8. arrToObj()

   Array.prototype.arrToObj = function(){
     var obj = {};
     for (var i = 0; i < this.length; i++) {
       obj[i] = this[i]
     return obj;
   

9. asObject(labels)

   Array.prototype.asObject = function(labels) {
     var result = {};
     var _ctx = this;
     labels.each(function(label, idx) {
       if (label != null)
         result[label] = _ctx[idx];
     })
     return result;