this.properties in runtime

The properties in runtime cannot be accessed using their name ( this.properties["Target"]), as in edittime, why ?

User number index like this.properties[0], this.properties[1]...

I know, what I meant to say is that the getproperty by name method is better than to get it by ID, for one reason: If you make changes in the properties table, the ids gets regenerated, this is bad because you have to edit all the lines containing this.properties[x] and reassign the ids ...

Because the minify. The global or private variables will be stored in array, too.

Oh I see, thanks