string-字符串(常用函数)
- string.lower
- string.upper
- string.title
- string.cat
- string.cut
- string.equal
- string.nequal
- string.cmp
- string.ncmp
- string.left
- string.right
- string.len
- string.find
- string.rfind
- string.findchar
- string.rfindchar
- string.reverse
- string.sub
- string.split
- string.splitlines
- string.getat
- string.getchineseletter
- string.format
- string.appendchar
- string.repeatself
- string.shuffle
- string.capitalize
- string.center
- string.count
- string.encode
- string.decode
- string.startswith
- string.endswith
- string.expandtabs
- string.index
- string.rindex
- string.join
- string.ljust
- string.rjust
- string.strip
- string.lstrip
- string.rstrip
- string.partition
- string.rpartition
- string.replace
- string.swapcase
- string.zfill
- string.isalnum
- string.isalpha
- string.isdecimal
- string.isnumeric
- string.isdigit
- string.islower
- string.isupper
- string.isspace
- string.istitle
- string.translation
- str.maketrans
- max
- min