JavaScript getter setter Starting in JavaScript 1.8.5, the get operator: can have an identifier which is either a number or a string; must have exactly zero parameters (see Incompatible ES5 change: literal getter and setter functions must now have exactly zero or one arguments for more information); must not appear in an object literal with anot…

getter-setter.js

var entry = {
  log : [],
  set current : function(str){
    return this.log[this.log.length-1] = str;
  }
  get latest : function(){
    if(this.log.length > 0){
      return this.log[this.length - 1];
    }else{
      return null;
    }
  }
}