Programmer Think

Google announced Kotlin as the official Android and development language at the I/O conference in 2017, and Android Studio also provides full support for Kotlin. How do I run kotlin's code?adopt https://try.kotlinlang.org Or IDEA and other IDEs that support Kotlin write directly on top of it, and then run away. Here's the main record of how to ...

This paper introduces the data structure DataFrame and eries of data analysis star pack Pandas in Python, which is practical. Copyright Statement: This is an original blogger article, please indicate the source of the original text for reproducing, no white lyrics! Writing time: 2020-06-06 0:08 ...

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preface The text and pictures of this article are from the Internet, only for learning and communication, not for any commercial purpose. The copyright belongs to the original author. If you have any questions, please contact us in time for handling. The annual 520 has just passed. Due to the impact of the epidemic, we missed this year's ...

preface There are many built-in commands in the script, but sometimes we want to customize some commands, because writing a script is not as convenient as typing a command. However, there is no document for the custom command on the scrap website. There is only one sentence: you can also use the commands_ The module setting adds a custom projec ...

overview There are two very famous improvements in java8, one is Lambda expression and the other is Stream. Stream is a stream. Its main function is to search and filter Collection data. It is similar to SQL database operation. The difference between stream and Collection is that Collection is only responsible for storing data, not for other ...

This tutorial series is divided into three phases 1.flask restful web service 2. Flash restful API (to be updated) 3. Flash httpauth implements permission control (to be updated) 4.uwsgi management flash application (to be updated) Article excerpted from http://www.pythodoc.com/flask-restful/ I corrected some of the procedural problems arisin ...

There are three ways to sort Java entity collections. The first is through a natively supported Comparator, the second is through a Lambda expression in java8, and the third is by using the apache-common toolkit.Tested to achieve the desired results, the third code is more readable and usable, and the third is recommended. The third sort ...

With the release of JDK 1.8 Streams API, HashMap has more ways to traverse, but which one should be chosen? Instead, it becomes a problem. This paper starts with the traversal method of HashMap, and then analyzes the advantages and disadvantages of various traversal methods of HashMap from the aspects of performance, principle and security. Th ...

Suppose you have installed bs4 requests This novel is chosen at will, so you don't have to worry too much Python 3 implementation. There are too many crawlers using Python 2 on the Internet, but there are still few crawlers using Python 3 The link is https://www.qu.la/book/12763/10664294.html Get the title of the article (find the exact htm ...