python字符串操作，以及对应的C#实现

--IndexOf--

python:

inx = str.find("aa")

c#:

var inx = str.IndexOf("aa");

--LastIndexOf--

python

inx  = str.rfind("aa")

c#

var inx = str.LastIndexOf("aa");

--Remove--

python

str = "asdfg"

str = str[3:]

#fg

c#

var str = "asdfg";

str = str.Remove(, );

//fg

--反向Remove--

python

str = "asdfg"

str = str[:-2]

#asd

c#

var str = "asdfg";

str = str.Remove(str.Length-, );

//asd

--SubString取中间段--

python

前后均为索引

str = "asdfg"

str = str[1:3]

#sd

c#

var str = "asdfg";

str = str.Substring(1, 2);

//sd

--TrimStart, TrimEnd--

python

def main():

    print "qwe_xxxxx".lstrip("qwe_")

#Output:xxxxx

#lstrip对应TrimStart

#rstrip对应TrimEnd

#strip为统一删除

#如果不填写参数，默认删除/r/n这类符号

C#

var str = "qwe_xxxxx";

str = str.TrimStart("qwe_")

//Output:xxxxx