Java composite data type

1. Java string In Java, strings are treated as objects of type String. The String class is located in the java.lang package, which is imported automatically by default. The String object will not be modified after creation. When we modify a String object, we actually point the original reference to ...

Posted on Fri, 31 Jan 2020 22:09:00 -0800 by Servyces

What is js | label and what is its use in the loop

Looking at the third chapter of the third edition of advanced JavaScript programming, I found that the label statement was not met in the normal learning of js. After learning and practice, the combination of label, break and continue can save some steps, and the nonsense is not much to say directly on the code. Let's start wi ...

Posted on Fri, 31 Jan 2020 14:24:05 -0800 by inerte

Flutter's rookie tutorial 2: the simplest MaterialApp

In the last article, did our first application show ugly? This article will show a materialApp import 'package:flutter/material.dart'; void main() { /** * runApp Function to display the root control on the screen */ runApp(new MaterialApp( title: "My application", // Change Ui with theme theme: new Them ...

Posted on Fri, 31 Jan 2020 12:49:11 -0800 by system_critical

Python Basic Exercises

Python Basic Exercises Here are some simple exercises I have written while learning Python. The answers to these exercises may not be completely correct for my own reference only! [Title 1] Print a graphic like this  *****    ***     *    ***   *****  # for i in range(-2,3): # for z in range(3-abs(i)): # ...

Posted on Fri, 31 Jan 2020 11:34:02 -0800 by mol

ECMAScript reference type

Object object New object var obj = new Object() var obj ={} var obj={age:23} ... hasOwnProperty(property) method var obj = {age:23} obj.hasOwnProperty("age") //Return true obj.hasOwnProperty("name") //Return false var obj = {2:23} undefined obj.hasOwnProperty(2) //Return true isPrototypeOf(object) determines whether th ...

Posted on Fri, 31 Jan 2020 09:48:36 -0800 by dc2000

I heard that people who want to be hackers have played the Monyer game (1-14 introduction)

Zero passEnter the portal to start the zeroth close (game link) Please click the link to go to the first level: the connection is on the left → ← the connection is on the right I can't see it.... (I can only see the names of a bunch of big guys, and I can also see the vegetable chicken. I'm i ...

Posted on Fri, 31 Jan 2020 06:09:15 -0800 by devangel

python if judgment, while loop, for loop

Article directory Conditional statement if condition judgment 1. Single judgment condition 2. Multiple judgment conditions 3. if conditional statement nesting 4. if statement exercise Judgement of leap year Loop statement while Loop 1. range() function usage 2. break, continue, exit usage brea ...

Posted on Wed, 29 Jan 2020 21:41:49 -0800 by madwormer2

Data preprocessing -- data discretization

Data discretization Data discretization (also known as data grouping) refers to grouping continuous data into a segment of discretized interval. According to whether the class attribute is considered in the discretization process, the discretization algorithm can be divided into supervised algorithm and ...

Posted on Wed, 29 Jan 2020 20:30:31 -0800 by Garion

[Netty Learning Notes] II. NIO Core Component Buffer

In the previous section, we learned that the three core components of NIO are Buffer, Channel, Selector. Relevance diagrams for the three core sections: Each channel corresponds to a Buffer Selector corresponds to one thread, and one thread corresponds to multiple channel s The figure above shows thre ...

Posted on Wed, 29 Jan 2020 18:24:45 -0800 by rami103

Text classification and data preprocessing

This blog mainly introduces data preprocessing, including building datasets and iterators. Because the pre training language model has the corresponding thesaurus file, it does not need to build the dictionary manually, but in the pre-processing stage, it needs to indicate the filled part and non fil ...

Posted on Wed, 29 Jan 2020 09:02:33 -0800 by raker7