1. a23f_all_the_same(target_rng as range, Optional exclude_empty = 1)
    target_rng -> the Excel range you want to check if the values are all the same.
    exclude_empty -> if it was set to 0, this function will take empty cell as a value.
    a23f_all_the_same -> return True if all values in the range are all the same, False if not.

2. a23f_all_the_different(target_rng as range, Optional exclude_empty = 1)
    target_rng -> the Excel range you want to check if the values are all different.
    exclude_empty -> if it was set to 0, this function will take empty cell as a value.
    a23f_all_the_different -> return True if all values in the range are all different, False if not. 

3. a23f_isin_cell(target_char, target_cell, Optional fuzzy = 0)
    target_char -> the character or a string you want to check if it was in a Excel cell.
    target_cell -> the Excel cell you want to find if a certain character or string was in it.
    fuzzy -> 
        a23f_isin_cell("hi", "Hi There!", 0): False
        a23f_isin_cell("hi", "Hi There!", 1): True

4. a23f_isin_range(target_cell, target_rng As Range, Optional fuzzy = 0)
    target_cell -> the Excel cell or a string you want to find if it was in Excel ranges.
    target_rng -> the Excel ranges you want to find if it contains the certain cell.value or a string.
    fuzzy ->
        a23f_isin_range("hi", ["Hello!", "Haruhi Lyn"], 0): False
        a23f_isin_range("hi", ["Hello!", "Haruhi Lyn"], 0): True

1. a23f_num_unique(target_rng as range, optional exclude_empty=1)
    This function will return how many different values are in a range.

2. a23f_num_isin_cell(target_char, target_cell, Optional fuzzy = 0)
    Returns how many target_chars are in the target_cell.
    
3. a23f_num_isin_range(target_cell, target_rng As Range, Optional fuzzy = 0)
    Returns how many string/characters in target_cell are in the target_rng.

1. a23f_get_after(target_string, separator)
    Returns the part in target_string after the first separator in target_string, 
    returns whole target_string while none of separator was in it.

2. a23f_get_before(target_string, separator)
    Returns the part in target_string before the first separator in target_string,
    returns whole target_string while none of separator was in it.

3. a23f_get_in_between(target_cell, first_char, second_char, Optional separator = ", ")
    Returns the part of target_cell between first_char and second_char (both excluded),
    and if there were more than one pairs of first_char and second_char, 
    it will return all texts in them and separate them by separator.
    a23f_get_in_between("Hi (John) and (Mary).", "(", ")"): "John, Mary"
    
4. a23f_get_nth_after_split(target_string, nth, split_by)
    a23f_get_nth_after_split("1st| 2nd| 3rd| 4th| 5th| 6th", 3, "|"): "3rd" (with trim() function inside)
    
5. a23f_get_nth_most_frequent(target_rng As Range, nth, Optional return_id = 1, Optional separator = ", ")
    Say there is a list you have to sign your name up every time you go into gym, it looks like below: 
    Name
    Tamio
    Michael
    Nilson
    Jack
    Tamio
    Tom
    Jack
    Tamio
    ...
    And you want to find out who goes to gym most frequently, just apply this:
    a23f_get_nth_most_frequent(the_name_column, 1) -> "Tamio",
    and the frequencies are a23f_get_nth_most_frequent(the_name_column, 1, 0) -> 3.
    This function is quite useful when you want to simply claculate a neat and small frequency table.       

1. a23f_calc_percentage(target_cell, target_rng As Range, Optional exponent = 1)
    Returns target_cell^(exponent) / SIGMA[target_rng.each_value^(exponent)],
    when expoent equals 1, this function returns the portion of target_cell's value among target_rng.
    
2. 23f_calc_reverse_percentage(target_cell, target_rng As Range, Optional exponent = 1)
    Say there is a series of number: 10, 20, 30, 40, 50 called A_Series,
    23f_calc_reverse_percentage(10, A_Series, 2) =
        (10^(-1))^(2) / SIGMA[(target_rng.each_value^(-1))^(2)] ≒ 0.683242

1. a23f_to_datetime(target_cell, Optional return_datevalue = 1)
    Returns date value of str(date like value),
    could apply on 'yyyy-mm-dd ...', 'yyyy/mm/dd ...', 'mm-dd-yyyy ...' ...and so on.