Android Bluetooth Library-Simple Use of FastBle
Released from Kindem's blog Welcome to reprint, but note the source
Recently, in the course of Internet of Things, we need to use Android Bluetooth API, but the native Bluetooth API is a little troublesome. So I searched the Internet to see if there was a good Android Bluetooth library, and then I found this baby and shared it wi ...
Added by zzman on Sat, 18 May 2019 14:11:16 +0300
Node.js uses mongoose to manipulate mongodb
1. Software configuration:
1.node v8.9.3
2. npm 5.5.1
3. For the mongoose and MongoDB versions, see package.json below.
// package.json
{
"name": "mongoosedemo",
"version": "1.0.0",
"description": "",
"main": "index.js",
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1"
},
"autho ...
Added by chadt on Sat, 18 May 2019 07:37:48 +0300
Multitask-protocol
I. Concepts of the protocol
Protocol, also known as micro-threading, fiber.The English name is Coroutine.
Collaboration is another way of multitasking in python, but takes up less execution units (understood as required resources) than threads.
The general understanding is that a function in a thread can store informatio ...
Added by Xanthis on Sat, 18 May 2019 04:28:50 +0300
Python Interesting | Emotional Analysis of Chinese Texts
Preface
Previously, I have talked about the path of python machine learning. This time, Luo Luopan takes you to complete a machine learning project of Chinese text sentiment analysis. Today's process is as follows:
Data Situation and Processing
Data situation
The data here are for the comments of the public (provided ...
Added by patrickrock on Sat, 18 May 2019 01:57:03 +0300
SpringBoot Source Parsing-Principle of Exception Handler Handling Exceptions
In projects, ExceptionHandler is often used as a global exception handling center. So what's the principle of ExceptionHandler handling exceptions? Let's analyze it today.
Example of ExceptionHandler
@RestControllerAdvice
public class GlobalExceptionHandler {
@ExceptionHandler(value = RuntimeException.class)
public String h ...
Added by donturo on Sat, 18 May 2019 00:43:19 +0300
Shell Initial (2) Shell Operator
Shell Initial (2) Shell Operator
Shell basic operator
Shell, like other programming languages, supports a variety of operators, including:
Arithmetic operator
Relational operator
Boolean operator
String operator
Native bash does not support simple mathematical operations, but can be implemented by other commands, such as awk and expr, e ...
Added by messer on Sat, 18 May 2019 00:24:05 +0300
Tencent Daniel teaches you how to use Java to add, delete, retrieve and traverse binary trees.
An explanation of binary tree from Baidu Encyclopedia:
In computer science, a binary tree is a tree structure with at most two subtrees per node. Usually, subtrees are called "left subtree" and "right subtree". Binary trees are often used to implement binary search trees and binary heaps.
A binary tree with a depth of K and ...
Added by legomez2000 on Fri, 17 May 2019 21:10:04 +0300
Java Collection Details 7: HashSet, TreeSet and LinkedHashSet
Today, we will explore the basic principles and source code implementation of HashSet, TreeSet and LinkedHashSet. Since these three set s are based on the three maps in the previous article, we recommend that you take a look at the previous article on map first, and use them together better.
Specific code can be found in my GitHub
https://gith ...
Added by Box on Fri, 17 May 2019 14:14:28 +0300
Formula Editor - Tip Dropdown Box Function - Dynamic Acquisition of Cursor Position
Introduction
Should develop the demand, need to write a formula editor plug-in, below to tell you about the implementation process. (wiping sweat, forcing calmness, cough, voice opening ~)
Html
There's really only a little bit of it.~
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title ...
Added by PHPLRNR on Fri, 17 May 2019 09:51:49 +0300
Concurrent HashMap for JDK Source Analysis (12)
This article will mainly talk about JDK version 1.8 Concurrent HashMap, its internal structure and many hash optimization algorithms are the same as JDK version 1.8 HashMap, so before reading this article, we must first understand HashMap, for reference. HashMap correlation In addition, there are also red and black trees in Concurrent HashMap, ...
Added by smokey20 on Fri, 17 May 2019 04:02:20 +0300