[First line of code--Android] A streamlined version of Kotlin's introductory tutorial

Google announced Kotlin as the official Android and development language at the I/O conference in 2017, and Android Studio also provides full support for Kotlin. How do I run kotlin's code?adopt https://try.kotlinlang.org Or IDEA and other IDEs that support Kotlin write directly on top of it, and then run away. Here's the main record of how to ...

Posted by gazolinia on Sat, 06 Jun 2020 19:57:34 +0200

Hundreds of billions of warehouse projects (warehouse theory_ Product dimension data loading (zipper table))

Product dimension data loading (zipper table) Zipper watch design: 1. Collect the full data of the day and store it in the ND (current day) table. 2. You can take out yesterday's full data from the history table and store it in the OD (last day's data) table. 3. ND-OD is the data added and changed on ...

Posted by eagle1771 on Fri, 05 Jun 2020 06:27:04 +0200

Adaptive page arrangement of a bunch of pictures

Recently, we are developing a page to display pictures in batches. The adaptive arrangement of pictures is an unavoidable problem After paying for a lot of hair, I finally finished the picture arrangement and encapsulated it into components. The final effect is as follows     1, Design ideas In order to make the structure clear, I process the ...

Posted by coreycollins on Mon, 01 Jun 2020 05:48:42 +0200

Visitor mode of behavior mode

1 General Visitor pattern is a behavior pattern, which is not commonly used. It can separate the algorithmic logic acting on the object from the object itself. 2 visitor mode When we need to operate on a group of similar types of objects, we can maintain the operation logic within each object separately, but this violates the principle of singl ...

Posted by markl999 on Sun, 31 May 2020 11:54:48 +0200

C#Simple Getting Started - Suitable for Beginners

First C#Program using System; namespace HelloWorldApplication // Namespace Declarations { /* Class name is HelloWorld */ class HelloWorld // A class { /* main function */ static void Main(string[] args) { /* My First C#Program */ Console.WriteLine("Hello World!"); Co ...

Posted by roneill on Sat, 30 May 2020 18:44:39 +0200

Binary Search Tree_BST

Catalog Binary Search Tree Definition Forms and basic properties Code base implementation Related Issues L2-004 Is this a binary search tree? Input format: Output format: thinking Problem Binary Search Tree Definition A binary search tree (English: Binary Search Tree), also known as a binary search tree, an ordered binary tree, or a so ...

Posted by dannyb785 on Sat, 30 May 2020 18:29:54 +0200

[12c] Histograms

Histogram, a special type of statistical information of columns, can provide more detailed data distribution information of columns in the table. Histogram stores values in buckets. Based on the number of different values and the distribution of data, the database selects the type of histogram to be created. The types of histogram are as follow ...

Posted by slibob on Wed, 27 May 2020 14:30:00 +0200

How springboot integrates Prometheus how to expose Histogram to obtain monitoring indicators such as P99

background How springboot integrates Prometheus is not described in detail here. For an understanding of the integration process, refer to the blog: Spring Boot uses Micrometer integrated Prometheus to monitor Java application performance, Let me tell you a little bit about how long p99, p90 and other metrics we need to get for some monitoring ...

Posted by weedo on Sat, 23 May 2020 21:43:57 +0200

react Reading Notes

Source Digging Booklet - react Actual: Design Patterns and Best Practices react design idea Property Expansion - Keep the props required by the current component and pass on other props var obj = {a: 1, b: 2, c: 3, d: 4, e: 5} const { a, ...other } = obj console.log(other) // {b: 2, c: 3, d: 4, e: 5} In react, the interface is entire ...

Posted by vulcant13 on Sat, 16 May 2020 21:57:03 +0200

Scan / train.py of pointnet + +

1. The author may divide the scanner data set into training set and test set and process them into. pickle files. 2. In the process of code running, the author read out the x, y, z coordinates of 1201 scenes in the training set and 312 scenes in the test set from the. pickle file. 3. Consider saving the point to a. txt file and visualizing ...

Posted by PHPHorizons on Sat, 16 May 2020 09:23:59 +0200