gistfile1.java

 public static RubyArray local_variables19(ThreadContext context, IRubyObject recv) {
        final Ruby runtime = context.runtime;
        HashSet<String> encounteredLocalVariables = new HashSet<String>();
        RubyArray allLocalVariables = runtime.newArray();
        DynamicScope currentScope = context.getCurrentScope();

        while (currentScope != null) {
            RubyArray localVariables = runtime.newArray();
            for (String name : currentScope.getAllNamesInScope()) {
                if (IdUtil.isLocal(name) && !encounteredLocalVariables.contains(name)) {
                    localVariables.push(runtime.newSymbol(name));
                    encounteredLocalVariables.add(name);
                }
            }
            allLocalVariables.push(localVariables);
            currentScope = currentScope.getParentScope();
        }

        allLocalVariables.reverse_bang();
        allLocalVariables.flatten_bang(context);

        return allLocalVariables;
    }