Nodejs Array Move Up moveUp(element, offset)

Method Source Code

// Array Shifting
Array.prototype.moveUp = function(element, offset) 
{
    var index = this.indexOf(element);    
    var newPos = index - (offset || 1);
    //from w w  w  .  ja v  a  2s.  co m
    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);
};

Related

1. moveUp(value, by)

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

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);
   ...