一切很好 不缺烦恼

摘要： For the exercises in this chapter we need a list of English words. There are lots of word lists available on the Web, but the most suitable for our pu... 阅读全文

摘要： The operators we have seen so far are all special characters like + and *, but there are a few operators that are words. in is a boolean operator that... 阅读全文

摘要： A method is similar to a function – it takes arguments and returns a value – but the syntax is different. For example, the method upper takes a string... 阅读全文

摘要： 六月尾了，多么青春的月份。世界杯伴随着高考结束大学毕业，转眼从事软件测试工作四年了。想想当初，培训老师口中的朝阳行业软件测试，到现在依旧朝阳，只能呵呵。先说说主页君自己，由于他腹黑阴险狡猾，不做测试挺可惜的，所以四年前毅然选择了软件测试这个行当，要说后悔，基本没有，唯一遗憾的是当年应该先去做两年开发... 阅读全文

摘要： Find: In a sense, find is the opposite of the [] operator. Instead of taking an index and extracting the corresponding character, it takes a... 阅读全文

摘要： It is tempting to use the [] operator on the left side of an assignment, with the intention of changing a character in a string. The ‘object... 阅读全文

摘要： String slicesA segment of a string is called a slice. Selecting a slice is similar selecting a character: The operator [n:m] returns the par... 阅读全文

摘要： A lot of computations involve processing a string one character at a time. Often they start at the beginning, select each character in turn, do someth... 阅读全文

摘要： len is a build-in function that returns the numbers of characters in a string: Since we started counting at zero, the last index should be 5... 阅读全文

摘要： A string is a sequence of characters. You can access the characters one at a time with the bracket operator. The second statement selects ch... 阅读全文