How to avoid multiple variable re-declarations on function outputs in JavaScript

Question

Consider the following example

function doSomethingToAVariable(variable){
    return variable + 1
}

function doSomethingToAVariableASecondTime(variable){
    re         


        

Answer 1

If you want to chain then you need to return the object instead which will contain the final value

function variableOperations( initialValue )
{
  this.value = initialValue;
  this.someOp1 = function(){ this.value += 1; return this; } 
  this.someOp2 = function(){ this.value += 2; return this; } 
}

var a = new variableOperations(1); //new object
a.someOp1().someOp2();

alert(a.value); //alerts 4