def col_scrubf(df, col_name, which, count=1, dest=False):
    """ Removes characters from the front of the entries in DataFrame for a column
    Parameters:
    df - DataFrame
        DataFrame to operate on
    col_name - string
        Name of column to scrub
    which - boolean array
        Boolean array that determines which elements to scrub, where True means scrub
    count - integer, default 1
        amount of characters to scrub
    dest - bool, default False
        Whether to apply the result to the DataFrame or return it.
        True is apply, False is return.
    """
    if dest:
        df.loc[which, col_name] = df.loc[which, col_name].str[count:]
    else:
        new_col = df[col_name].copy()
        new_col[which] = df.loc[which, col_name].str[count:]
        return new_col
