Nodejs Array Move Up moveUp(value, by)

Method Source Code

Array.prototype.moveUp = function(value, by) {
   var index = this.indexOf(value),
      newPos = index - (pos || 1);//www.  j  ava2 s. c om

   if (index === -1) {
      throw new Error('Item not found');
   }

   if (newPos < 0) {
      newPos = 0;
   }

   this.splice(index,1);
   this.splice(newPos, 0, value);
}

Related

1. moveUp(element, offset)

   Array.prototype.moveUp = function(element, offset) 
       var index = this.indexOf(element);    
       var newPos = index - (offset || 1);
       if(index === -1) { throw new Error("Element not found in array"); }
       if(newPos < 0) { newPos = 0; }
       this.splice(index,1);
       this.splice(newPos,0,element);
   };
   ...
   

2. moveUp(value, by)

   Array.prototype.moveUp = function(value, by) {
       var index = this.indexOf(value),
           newPos = index - (by || 1);
       if(index === -1)
           throw new Error("Element not found in array");
       if(newPos < 0)
           newPos = 0;
       this.splice(index,1);
       this.splice(newPos,0,value);
   ...