static function HasKey (key : String) : boolean

Description

Returns true if key exists in the preferences.

Quick notes that last between Unity Sessions.

// Simple Editor Script that lets you create / save quick notes
// Between Unity Sessions.

class QuickNotes extends EditorWindow {

    var note : String = "Notes:\n->\n->";

    @MenuItem("Examples/QuickNotes")
    static function Init() {
        var window  = GetWindow(QuickNotes);
        window.Show();
    }
    function OnGUI() {
        note = EditorGUILayout.TextArea(note,
            GUILayout.Width(position.width-5),
            GUILayout.Height(position.height - 30));
        EditorGUILayout.BeginHorizontal();
        if(GUILayout.Button("Reset"))
            note = "";
        if(GUILayout.Button("Clear Story",GUILayout.Width(72))) {
            note = "Notes:\n->\n->";
        }
        EditorGUILayout.EndHorizontal();
    }
    function OnFocus() {
        if(EditorPrefs.HasKey("QuickNotes"))
            note = EditorPrefs.GetString("QuickNotes");
    }
    function OnLostFocus() {
        EditorPrefs.SetString("QuickNotes",note);
    }
    function OnDestroy() {
        EditorPrefs.SetString("QuickNotes",note);
    }
}