The Way to Go Language for Front-end Developers-defer, Error Handling, panic and Recovery

1. defer 1.1 defer call Defer: defer defer calls have the following features: Ensure that the call occurs at the end Parameters are calculated in defer statement defer list is last in first out Create a simple defer function that lets the prin ...

Posted on Mon, 16 Sep 2019 06:51:11 -0700 by Adika

Java Calls Third Party Express Logistics Express Single Number Query api Docking

Comparison of Third Party Logistics Interfaces Express inquiry API has two kinds: instant inquiry and subscription inquiry. The instant request is to return data, the subscription is to subscribe to express order number to interface, and the logistics track update is to return data in full. At present, express birds, express 100, aggregate data ...

Posted on Mon, 16 Sep 2019 02:51:02 -0700 by shakuni

One line of Python code's legendary Technology

First, you need to understand Python Zen, a line of code output "The Zen of Python": python -c "import this" """ The Zen of Python, by Tim Peters Beautiful is better than ugly. Explicit is better than implicit. Simple is better than compl ...

Posted on Mon, 16 Sep 2019 02:17:09 -0700 by Zpixel

Single, Double and Two Design Patterns

#What are single and double assignmentsdispatch refers to the process of binding a corresponding method body to an object according to its actual type. For example, there are class X and its two subclasses X1 and X2, both of which implement the instance method m(). Usually methods of subclasses X1 and X2 should be preceded by @Override, so ther ...

Posted on Sun, 15 Sep 2019 20:33:25 -0700 by del753

Java 13 will be released tomorrow. Interpretation of the latest and newest features

In August 2017, the JCP Executive Committee proposed changing the frequency of Java publishing to every six months, with a new publishing cycle that strictly follows time points and will be released each year in March and September. The latest version of JDK 13 will be released on September 17, 1919. JDK13 is currently in the Release-Candidate ...

Posted on Sun, 15 Sep 2019 18:54:15 -0700 by skorp

Several lines of python code-verification code recognition processing

First, in automated testing, there are two ways to deal with verification codes: 1. Look for development to remove validation codes or use universal validation codes 2. Automatic identification using OCR Here, one way is to communicate with R&D. ...

Posted on Sun, 15 Sep 2019 07:05:00 -0700 by the_ut_tick

python implements the underlying data structure

The code involved in this article has been placed in my github - >. link python implements the basic data structure (1) python implements the basic data structure (2) python implements the basic data structure (3) python grammar is more concise, ...

Posted on Sun, 15 Sep 2019 04:47:33 -0700 by BMorganVA

Compiling Principle - LR Analyser (C#)

Purpose and Requirement of LR(1) Analysis Program Experiment _Develop a set of items that allow clashes of norms to be handled by looking forward at a symbol, and can solve the problem of invalid reduction to resolve the conflict analysis process. ...

Posted on Sun, 15 Sep 2019 01:49:32 -0700 by the_manic_mouse

SpringBoot integration uses MyBatis XML configuration version

ORM Framework Object Relational Mapping (ORM) is a technology to solve the mismatch between object-oriented and relational database. In short, ORM automatically persists objects in programs to relational databases by using metadata that describes the mapping between objects and databases. Why ORM? When you develop an application (without O ...

Posted on Sat, 14 Sep 2019 06:52:58 -0700 by batman

Hadoop Series - Distributed Computing Framework MapReduce

1. Overview of MapReduce Hadoop MapReduce is a distributed computing framework for writing batch applications.Written programs can be submitted to the Hadoop cluster for parallel processing of large datasets. The MapReduce job splits the input dataset into separate blocks, which are processed by the map in parallel, and the framework sorts the ...

Posted on Fri, 13 Sep 2019 09:21:27 -0700 by tharagleb