In daily use of ArrayList, I believe that everyone has encountered such errors as Index Out of Bounds Exception, but often the situation is that index is greater than or equal to Size. Today, I am talking about the situation that Index is smaller than Size. This is a sudden exception in the process of using the mobile p ...
Posted on Sat, 12 Jan 2019 10:54:11 -0800 by JasperBosch
Angular JS develops mobile project based on ionic framework. How to judge user rights before entering the front desk?
First reference https://my.oschina.net/blogsh... This blog is revised in conjunction with personal development projects
The first reaction is to add ng-if condition judgment on the tab which is to be controlled by authority, ...
Posted on Thu, 10 Jan 2019 22:51:11 -0800 by bo0
[Da Shengdai's Technical Column] http://blog.csdn.net/qq_23191031 Respect for the success of others'work means respect for yourself.
stay "Android Control Architecture" Details of Android Control Architecture and Common Coordinate System In this article, I briefly described MotionEvent's common methods in the section &q ...
Posted on Tue, 08 Jan 2019 13:21:09 -0800 by buzz
Regular expressions commonly used in IOS
Regular expressions are used in string processing, form validation and other occasions, practical and efficient. Now we collect some commonly used expressions here in case we need them from time to time.
Regular expressions matching Chinese characters: [u 4e00- 9fa5]
Commentary: Matching Ch ...
Posted on Mon, 07 Jan 2019 21:00:10 -0800 by someone2088
Vue+Django REST framework
Set up a website of fresh supermarket with front and back ends separated
Django rtf completes mobile phone registration and user login (middle)
Principle of Json Web Token
Because our drf token auth has its shortcomings. So the most common way is JWT.
The following is reproduced in: http://lion1ou.win/20 ...
Posted on Tue, 01 Jan 2019 23:27:09 -0800 by highphilosopher
create-react-app is a global command-line tool released by Facebook to create a new project.
Usually when we start a react web or app project, we will use npm or yarn to install some dependencies needed by the project, then write webpack.config.js, a series of complex configurations, build the development environment and writ ...
Posted on Mon, 31 Dec 2018 17:48:07 -0800 by mikeyandyou
It is a very common function in the development of APP to determine whether the application status is in the foreground or in the background, and to obtain the basic application information such as wifi or traffic connection. Today we will introduce AppState and NetInfo modules respectively.
AppState can get whether the current AP ...
Posted on Thu, 27 Dec 2018 19:57:07 -0800 by Gutspiller
First: Data grabbing:
1: Background research
1: Check robots.txt to find out what restrictions are imposed on crawling the site.
2): pip install builtwith；pip install python-whois
2: Data grabbing:
1: Dynamic loading content:
# -*- coding: utf-8 -*-
from selenium import webdriver
Posted on Thu, 27 Dec 2018 14:03:06 -0800 by t_miller_3
Face recognition is a popular application in robotic applications. Some examples of Haar algorithm are found on the internet. They can run under opencv and recognize normally. They plan to run in ros. After searching on the internet, they find out.
pi_face_tracker This example is an application in Pi robot. Pi robot is a mobile robot with a ...
Posted on Tue, 25 Dec 2018 11:09:07 -0800 by Nuser
In the current mainstream architecture, we increasingly see the existence of web Api, compact, flexible, based on Http protocol, which makes it serve as a good service endpoint in more and more micro-service projects or mobile projects.
problemTake Asp.Net Web Api as an example, with the expansion of business and product iteration, our web api ...
Posted on Thu, 20 Dec 2018 18:33:05 -0800 by isiah