Nodejs Array Move Down moveDown(value, by)

Method Source Code

Array.prototype.moveDown = function(value, by) {
    var index = this.indexOf(value),
        newPos = index + (by || 1);/* w w  w  . jav  a  2 s. co  m*/
    
    if(index === -1)
        throw new Error("Element not found in array");
    
    if(newPos >= this.length)
        newPos = this.length;
    
    this.splice(index, 1);
    this.splice(newPos,0,value);
    
    return newPos;
};

Related

1. moveDown(element, offset)

   Array.prototype.moveDown = 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 >= this.length) { newPos = this.length; }
       this.splice(index, 1);
       this.splice(newPos,0,element);
   };
   ...
   

2. moveDown(value, by)

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

3. moveElement(index, delta)

   Array.prototype.moveElement = function (index, delta) {
       var index2, temp_item;
       if (index < 0 || index >= this.length) {
           return false;
       index2 = index + delta;
       if (index2 < 0 || index2 >= this.length || index2 == index) {
           return false;
       temp_item = this[index2];
       this[index2] = this[index];
       this[index] = temp_item;
       return true;
   };
   Array.prototype.getPageData = function(data, pageSize, currentPageNo)
       var start = currentPageNo * pageSize,
           end = (currentPageNo * pageSize + pageSize) > data.length
                   ? data.length
                   : (pageSize * pageSize + pageSize);
       return data.slice(start, end);
   };