## Python notes (15): anonymous functions and @ property

(1) Anonymous function
You can use anonymous functions when you don't want to display the defined functions.
1 def f(x):
2 return x*x
3
4 #Assign anonymous functions to a variable
5 result = lambda x:x*x
6
7 print(result(5))
8 print(f(5))
From the output, we can see that lambda x:x*x is actually:
1 def f(x):
2 return x*x
The lambd ...

Posted by **chantown** on *Sat, 15 Feb 2020 08:29:52 -0800*

## [Java_22] JDK New

JDK 1.8 New
1. Functional interface
1. Functional interface
(1) Concepts
*Interfaces with only one abstract method
(2) Format
@FunctionalInterface //Use this comment to determine if the interface is a functional interface.
public class class name {
public abstract return value method name (parameter list);
}
2. Funct ...

Posted by **starnol** on *Thu, 13 Feb 2020 12:55:40 -0800*

## [deep learning] village to network -- on the new features of tensorflow Eagle execution mechanism

Article directory
Preface
Convolution directly using operation
Automatically calculate gradient (derivative)
Calculate the gradient of all parameters
Calculate the gradient of all variables
Using Python program flow to control model flow
Automatic optimization
Preface
This article is [deep lea ...

Posted by **bubatalazi** on *Thu, 13 Feb 2020 02:09:50 -0800*

## Java lambda expression understanding

brief introduction
As a new feature of java8, lambda expression is oriented to function programming, which makes the code more concise and improves the programming efficiency. As a developer, we should not only learn to use it, but also understand the operation principle behind it
lambda general use ...

Posted by **ntohky14** on *Tue, 11 Feb 2020 23:45:23 -0800*

## Take a quick look at jdk8

You've been watching java concurrently and you've been saying a bit too much. Just relax!This time, let's briefly talk about jdk8, which has not been used for a long time and is new to us. It's interesting to look at it carefully. Let's turn our brain into an angle to write code. Because we usually write code in jdk7 now, we are all thinking ab ...

Posted by **Xephon** on *Tue, 11 Feb 2020 10:42:17 -0800*

## Introduction to Python neural network (handwritten digit recognition)

1.1 personal records
① Using Python 3.7
② The editor is pycharm (I don't think it's easy to use, many libraries will fail directly, and print can't save - complaints of lazy cancer), the solution. For example, scipy, please download pip install scipy in cmd.
imshow () does not show the problem of imag ...

Posted by **David Rech** on *Sat, 08 Feb 2020 09:07:01 -0800*

## Two factor analysis of variance without repetition in python

Case study:
Analyze whether brands and regions have a significant impact on sales volume()
Make assumptions:
In order to test the influence of the two factors, we need to put forward the following assumptions for the two factors.
The assumptions for the line factors are as follows:
Since there ...

Posted by **trevHCS** on *Sat, 08 Feb 2020 01:35:54 -0800*

## [Python] 25 useful Python snippets to help you with your daily work

Introduction
Python is a general advanced programming language.There are many things you can do with it, such as developing desktop GUI applications, Web sites, Web applications, and so on.
Python also allows developers to focus on the core functionality of the application by handling common programm ...

Posted by **Goafer** on *Fri, 07 Feb 2020 22:20:58 -0800*

## JavaScript arrow function

Arrow function is equivalent to Lambda expression or closure syntax of other languages. Arrow function is a simplified way to write ordinary functions.
The syntax format of the arrow function is as follows:
{pararnl, pararn2,..., pararnN) => {statements }
Amount to:
function (paraml, par ...

Posted by **micklerlop** on *Thu, 06 Feb 2020 04:28:09 -0800*

## Multiple linear regression -- case analysis and python practice

Regression analysis -- multiple regression
Introduce the statistics in multiple regression analysis
Total observed value
Total independent variable
Freedom: return degrees of freedom, residual degrees of freedom
Sum of total square of SST
Sum of squares of SSR regression
Sum of squares o ...

Posted by **liza** on *Mon, 03 Feb 2020 07:07:43 -0800*