print(' contains(a, 1) :', contains(a, 1))
print(' contains(b, "d"):', contains(b, "d"))
print(' countOf...(a, 1) :', countOf(a, 1))
print(' countOf(b, "d") :', countOf(b, "d"))
print(' indexOf(a, 5) :'...concat(a, b): [1, 2, 3, 'a', 'b', 'c']
搜索:
contains(a, 1) : True
contains(b, "d"): False
countOf...(a, 1) : 1
countOf(b, "d") : 0
indexOf(a, 5) : 0
访问:
getitem(b, 1) : b