GetComponent via String name?

I'm trying to GetComponent with a String name

Easy, you can use: GetComponent(string type). From the oficial docs: https://docs.unity3d.com/ScriptReference/GameObject.GetComponent.html

 using UnityEngine;
 
 public class GetComponentExample : MonoBehaviour
     {
     public const string knownClassName = "Rigidbody";
     public string unknownClassName;

     void Start( )
     {
         Rigidbody comp1 = gameObject.GetComponent(knownClassName ) as Rigidbody ;
         var comp2 = gameObject.GetComponent(unknownClassName ) as MonoBehaviour;
     }
 }

Is there a way to convert a string to a Type identifier?

Yes. As @smoggach said, it depends on the language. In c#, it sometimes work: System.Type.GetType("yourStringHere")

But, I don't know why you would want this. If you don't know the type at compile time, you don't have other option than cast it as a MonoBehaviour, and you can't do much with that...

This depends more on the language you're using.

C#: https://msdn.microsoft.com/en-us/library/aa310400%28v=vs.71%29.aspx

In java you would use the method Class.forName().

After spending a few hours searching, I found the solution. Here is a small script that I made :)

This will create an array of Strings where you can write the names of the scripts you want to activate.

 var MyScriptNames: String[];
 
     function Start(){
     
     for(var i : int = 0; i < MyScriptNames.Length; i++)
         {
          (gameObject.GetComponent(MyScriptNames[i]) as MonoBehaviour).enabled = true;
          } 
     }