How to use Python to crawl small game websites and collect favorite games (with source code)

    Introduction: Python is a simple, easy to learn and powerful programming language. Without tedious configuration, master the basic syntax and understand the basic library functions, you can write your own programs by calling a large number of existing toolkits, easily realize batch automatic operation, and greatly improve the efficiency o ...

Posted on Mon, 11 May 2020 02:49:10 -0700 by Tea_J

Do you really use the Flutter date component

The Flutter system provides some date selection components, such as DayPicker, MonthPicker, YearPicker, showDatePicker, Cupertino datepicker, etc. the first four are Material style components, and the last one is iOS style components. This paper introduces the basic usage of control and how to realize internationalization. If the internationa ...

Posted on Fri, 08 May 2020 17:04:18 -0700 by dotbands

python object-oriented seven property() function and @ property decorator

1, property introduction In order to keep the properties of the object from being exposed to the caller and check the property value, the interface function to access the property is set, and the property can be accessed by using the function, and the property can be checked inside the function. 1 >>> class Student(object): 2   ...

Posted on Fri, 08 May 2020 08:28:00 -0700 by matte

Simple implementation and notes of jQuery selector

#Introduce jQuery tool library ##Download address - cdn:http://www.jq22.com/cdn/#a2 -Download address: http://www.jq22.com/jquery-info122 #Document query -Chinese: https://www.jquery223.com/ -English: https://jquery.com   ##Introducing jQuery ```js < script SRC = ". / jQuery. JS" > ``` ##DOMContentLoaded and onload ```js //Wait ...

Posted on Fri, 08 May 2020 04:55:42 -0700 by robert_a89

spring Source Read Notes 10: bean Life Cycle

The previous articles focused on analyzing SpringThe principle of the IOC Container section, the core logic of which is related to the creation and management of beans. For the management of single beans, from creation to caching to destruction, there is a complete life cycle, and Spring also provides multiple interfaces for users to extend the ...

Posted on Wed, 06 May 2020 18:04:27 -0700 by justgrafx

jquery performance optimization

1. Selection of selector The performance of id selector is the best, followed by tag selector, class selector and attribute selector $("#id")>$("p")>$(".class")>$("[attribute=value]") 2. Cache jquery objects var $active_light = $("#trafic_light input");//Cache variables $active_light.bind("click",function( ...

Posted on Wed, 06 May 2020 09:14:15 -0700 by carlmcdade

One stop solution to various pain points of enumeration

If the variable value has only a limited number of optional values, it is a normal operation to define constants with enumeration classes. However, in the business code, we do not want to rely on the coordination () for business operations, but to customize the number attributes to avoid the impact of increasing or decreasing the enumeration va ...

Posted on Tue, 05 May 2020 22:59:49 -0700 by mrhappiness

PEP 468: Preserving Keyword Argument Order

Python 3.6.0 optimized the dictionary. The new dictionary is faster, takes up less memory, and is amazing.Looking at the data on the Internet, most of them point to [Python-Dev] More compact dictionaries with faster iteration This article is creative in outlining the differences between the old dictionary and the new dictionary, as well as the ...

Posted on Tue, 05 May 2020 19:01:48 -0700 by beefy23

android camera acquisition and preview - the second method

android camera acquisition and preview - the second method android camera acquisition and preview - several methods http://blog.csdn.net/f562230829/article/details/78905530 The first method http://blog.csdn.net/f562230829/article/details/78905652 demo address git clone git@gitee.com:audiocn/androidCamera.git htt ...

Posted on Tue, 05 May 2020 15:25:00 -0700 by yanjchan

New understanding of Spring IOC

Analysis of spring IOC Re IOC and DI IOC(Inversion of Control) inversion of control: the so-called inversion of control is to reverse the code that we need to create and depend on the objects in our code to the container for help. Therefore, we need to create a container and a description to let the container know the relationship between the ...

Posted on Tue, 05 May 2020 14:07:49 -0700 by shadow1200