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1. Lambda 1.1 general Lambda expression is a function without name, which can also be called closure. It is the most important new feature released by Java 8. It is essentially an anonymous inner class or a piece of code that can be passed And the arrow function 1.2 why use Lambda expressions Lambda expression is a short form of anonymous ...

First post a few cases. Students with high level can challenge: Select employees with salary greater than 8000 from the employee set and place them in a new set.Count the sum of the maximum salary, average salary and salary of employees.Employees are ranked from high to low in salary, and the younger ones are the first.Classify employees by ...

1. Introduction to lambda 1.1 introduction to lambda expression Lambda expression is an anonymous function. We can understand lambda expression as a piece of code that can be passed (passing code like data). You can write more concise and flexible code. As one A more compact code style has improved the expression ability of Java language. JDK ...

Rent price analysis of rental housing in Shanghai In this paper, we use crawler to crawl the housing rental data of Shanghai, and use python to clean, analyze and display the data, and carry out data mining modeling and prediction for housing rent. # Import related packages import pandas as pd import numpy as np import seaborn as sns import ma ...

This article is about GitHub https://github.com/Jack-Cherish/PythonPark Has included, there are technical dry goods articles, collated learning materials, interview experience sharing of first-line large factories, etc., welcome to Star and improve. 1, Waste classification Do you remember the gar ...

Naive Bayesian algorithm is simple and efficient.Next, we will describe how it can be used to identify the authors of A Dream of Red Mansions. The first step, of course, is to have text data first. I downloaded a txt freely on the Internet (I was in a hurry to hand in the draft at that time.)Classification is definitely a round-by-turn score, ...

Playing with Stream in Java 8 By litesky Link: http://www.jianshu.com/p/11c925cdba50 I believe you have heard about Java8 Stream, but you may not be able to use it or you are not familiar with it. This article will take you to use it from scratch, step by step, and lead you to the peak of Stream. Operator What are operators? Operator is a k ...

tkinter getting started (4) -- list box, scroll bar, Scale 1. List box, for multiple options 2. When there are many list boxes, the solution 3. scale component enables users to select a certain range of data 1. List box, for multiple options import tkinter as tk root = tk.Tk()#Generate top windo ...

Function (subroutine, procedures) definition: Function is to encapsulate a set of statements with a name (function name). To execute this function, you only need to call its function name effect:   Easy to reuse a part of code and reduce duplicate code Easy to modify code and expand Keep the ...

The algorithm of python Development & data structure (4) data structure 1. Circular queue 2. Python queue built-in module 3. List 3.1 creating a linked list 3.2 insertion of linked list nodes 3.3 deletion of linked list nodes 4. Double linked list 4.1 insertion of double linked list nodes 4.2 ...