Exception while returning an empty Associative array from PLSQL function

 declare
    TYPE parArray IS TABLE OF VARCHAR2(64) index by binary_integer;
    v_parArray parArray;
    arrayCount number;
    lsPar parArray;

    begin
    v_parArray(1):='A';
    v_parArray(2):='B';
    v_parArray(3):='C';

    arrayCount:=v_parArray.Count;
       For i In 1 .. arrayCount 
       Loop
          lsPar(i):=v_parArray(i);
       End Loop;

     arrayCount:=lsPar.Count;
        For i In 1 .. arrayCount
         Loop
          dbms_output.put_line('The value of Ispar at index '||i||' is '||lsPar(i));
        End Loop;
     end;  

 The value of Ispar at index 1 is A
 The value of Ispar at index 2 is B
 The value of Ispar at index 3 is C

foreach ($attributes as $key => $value) {
    if (empty($value)) {
        echo "'$key' is empty\n";
    }
}

if(!array_filter($attributes)) {
    echo 'All values are empty';
}

if (array_search('', $attributes) !== FALSE) {
    echo 'One of the values in the array is empty';
}

Dbms_Output.Put_Line('Dropping TABLE '|| L_Key ||);

EXECUTE IMMEDIATE 'create table schema1.' ||l_key||' as select * from schema2.'||l_tbl(l_key)||;

while elem is not null loop
    dbms_output.put_line(elem || ': ' || var_assoc_varchar(elem));
    elem := var_assoc_varchar.next(elem);   
end loop;

create or replace package my_pkg as

  type textGroupArray IS TABLE OF VARCHAR2(30) INDEX BY BINARY_INTEGER;

  FUNCTION createChecksumArray(checksumNumber VARCHAR2) RETURN textGroupArray;

end my_pkg;
/

create or replace package body my_pkg as
    FUNCTION createChecksumArray( checksumNumber VARCHAR2 )
    RETURN textGroupArray 
    is
      ..    
      TYPE textGroupArray  IS TABLE OF VARCHAR2(30)
      INDEX BY             BINARY_INTEGER;
      textGroups           textGroupArray;
      ..
    BEGIN
      ..
      textGroups := textGroupArray();
      ..
      (A LOOP)
        -- add textgroup into the array
        IF textGroup != 0 THEN
          arrayCount               := arrayCount + 1;
          textGroups( arrayCount ) := TRIM( textGroup );
        END IF;
      (END THE LOOP)
      ..
      RETURN textGroups;
    end;

end my_pkg;
/