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1. Enumeration - enumerate can have parameters We did this before: i = 0for item in iterable: print i, item i += 1 Now let's do this: for i, item in enumerate(iterable): print i, item The enumerate function also receives the second parameter. As follows: >>> list(enumerate('abc')) [(0, 'a'), (1, 'b'), (2, 'c')] >>> list(en ...

Note: This article only describes the basic usage, and does not touch on the NIO, the NIO aspects of things, described in a later blog. Random Access File is placed before it is described. File In the filename system, the filename is used to locate the storage location metadata: the data describing the data, where we treat a file as a data, the ...

This update mainly solves the problem that the download links of old pages may be in Thunderbolt and ftp format, and that they should be duplicated, because each page has a recommendation list, which will also contain relevant detailed links, as well as compatible with other page formats. Two methods are updated: public static void spider(int p ...

When I study selenium 2 java, I have a function, which needs to test paging, 20 data per page. It's too troublesome to add one by one. The key is to add more than ten data to each page. I simply write a method to automatically add one of my high school grades. Share as follows: //Add High School Achievements public static void addRecord(WebDri ...

Continue to give the AC program of HDU 2033~2043 below for your reference.The 10 questions 2033-2043 are classified as "ACM Programming Final Examination (2006/06/07)" and "2005 Experimental Class Short Term Examination". HDU 2033: Everyone loves A+B Simple branch structure. #include <stdio.h> int main() { ...

For students who start learning C language programming or C++ process-oriented programming, it is good to use online OJ website for practice training to improve their programming ability.There are many OJ websites at home and abroad. It is unrealistic and unnecessary to go and see each one and brush a topic.Even with an OJ website, it's difficu ...

Catalog 1. Definition of reference 2. Essence of Citation 3. Significance of Citation 4. Special Reference - const Reference 5. The relationship between reference and pointer 1. Definition of reference C++ adds the concept of reference: A reference can be seen as an alias for a defi ...

Introduction Happy Mid-Autumn Festival, you recently read Spring source code, always half-way, very hard to see the getBean part of the source code (IOC), will write a few blog s recently, write down their own feelings. Entrance General logic of getBean in AbstractBeanFactory //Source code of getBean method in AbstractBeanFactory @Override publ ...

Original Link: https://my.oschina.net/u/2325575/blog/543731 In this chapter we will discuss generics and containers, which are precisely the generic requirements that arise from the re ...

Processes and threads A process is an instance of a program running. A process can contain multiple threads, so all resources in a thread can be shared among multiple threads in the same process, which is the basic unit of the dynamic operation of the operating system; each thread is an instance of the process, which can be scheduled and run in ...