Here is what we have:
var MyObject = function(){
var contents = [undefined,2,undefined,4,5];
this.getContents = function(){
return contents;
}
}
var o = new MyObject();
As you understand, o.getContents() has the value of [undefined,2,undefined,4,5]
What I want to do is remove the undefined values of that private array, without overwriting the entire array, without making the private contents public, and without changing the objects code in general.
return contents.filter(function(e) {return e});
This filter methods creates a new array while removing "", null, undefined and 0 values from the input array.
return contents.filter(Number), Tada!
contents private variable content too, since you're passing a reference of it to your reindex function.Answering my own question, that was the approach I followed:
var MyObject = function(){
var contents = [undefined,2,undefined,4,5];
this.getContents = function(){
return contents;
}
}
// Not extending the Array prototype is always a good idea
var reIndex = function(){
for(var i = 0; i < this.length; i++)
{
//Remove this element from the array
if(this[i] === undefined){
this.splice(i, 1);
}
}
}
var o = new MyObject();
console.log(o.getContents()); //[undefined, 2, undefined, 4, 5]
reIndex.call(o.getContents());
console.log(o.getContents()); //[2, 4, 5]
Live example here
myObject.getProperty().value = 10;) and wanted to share it. The reason I haven't accepted my answer, is because it is possible that someone has a better answer to this :)