01_opeEqu_sample
my_idx1.index... [0]
my_idx1.index... [1]
my_idx.index... [0]
my_idx.index... [1]

02_init_sample
my_idx1.index... [0]
my_idx1.index... [1]
my_idx.index... [0]
my_idx.index... [1]

03_append_sample
my_idx.index... [2]
my_idx.index... [4]

04_update_sample
my_idx.index... [2]
my_idx.index... [4]
my_idx.index... [1]
my_idx.index... [4]
ret... [-1]

05_erase_sample
my_idx.index... [2]
my_idx.index... [4]
my_idx.index... [6]
ret... [1]
ret... [1]
ret... [0]

06_index_sample
my_idx.index[Pansy]... [2]
my_idx.index[Pansy]... [6]
my_idx.index... [2]
my_idx.index... [6]

