use Chart.js Draw a gradient curve, show the coordinates of a point, step through a pit

The requirement is that you have a series of data that you write to death in the JS and use these data points to draw a line graph.The interface is then called to get the data for a point (only the transverse coordinates), which is represented on the line graph and displayed as the point data (tooltip). First look at t ...

Added by binarymonkey on Thu, 09 Jul 2020 17:41:57 +0300

Coexistence of Kotlin and Java, calling kotlin code in -Java

Call of kotlin data class Call of object simple profit mode class in Kotlin Calling file class in Kotlin Flexible transfer of parameters by calling jvm annotation String string null call Call of kotlin data class kotlin Code: package com.tianfu.kotlin /** * age Member annotations cannot have get and ...

Added by beezza on Wed, 08 Jul 2020 19:00:57 +0300

MFC+Opencv3 Camera Read+Gray Histogram+Frame Number Comparison

1. Create a dialog-based MFC program under vs. The layout is as follows 2. Initialize Add the following code to the OnInitDialog() function in the C***Dlg class                          CWnd *pWnd1 = GetDlgItem(IDC_PIC1); //Gets the window class that displays the camera picture (parameter is control ID) CWnd *pWnd2 = G ...

Added by psy on Wed, 08 Jul 2020 18:26:54 +0300

[Spring] Pure java for Spring-hibernate integration

First import the corresponding jar package for Spring-hibernate Then prepare the file for the database connectionHibernate.propertiesAlsoJdbc.properties Hibernate.propertiesFile: Configure the hibernate dialect and automatic table building hibernate.dialect=org.hibernate.dialect.H2Dialect hibernate.hbm2ddl.auto=create Jdbc.propertiesFi ...

Added by Master_Phantom on Wed, 08 Jul 2020 17:41:09 +0300

web front-end project integrates both JSP and FreeMaker_u_Multi-view Parser Configuration

*In 2017, at the request of the company, responsible for research and development of intelligent analysis platform, using OLAP technology to analyze tax data from multiple dimensions, levels and cross-business domains, discover data characteristics, summarize tax laws, and support leadership decision-making. After nearly a year, it was finally ...

Added by xxxzom_biexxx on Wed, 08 Jul 2020 17:29:29 +0300

The back-end data loaded by the select component of jqWEUI is items

jqweui I don't know how many people have used it. I often use it to develop webapps Its select component is more often used, but this time I need to get the selected items data from the database instead of writing the page dead After thinking about it for a while, I finally came up with a method, which is also effecti ...

Added by EZbb on Tue, 07 Jul 2020 19:01:00 +0300

Chapter 7 Data Regulation: Cleanup, Conversion, Merge, Reshaping (3)

Chapter 7 Data Regulation: Cleanup, Conversion, Merge, Reshaping (3) Merge overlapping data Numpy.where() A vectorized if-else import pandas as pd;import numpy as np from pandas import Series,DataFrame a = Series([np.nan,2.5,np.nan,3.5,4.5,np.nan],index=['f','e','d','c','b','a']) Out[8]: f NaN e 2.5 d ...

Added by bsteimel on Tue, 07 Jul 2020 18:25:57 +0300

mybatis Series IV: Dynamic SQL

Dynamic SQL is a powerful feature of MyBatis.When using JDBC to manipulate data, concatenating conditions into SQL strings can be painful if there are too many query conditions. The usual solution is to write a lot of if-else conditional statements and strings to concatenate, and make sure you don't forget spaces or omit commas at the end of fi ...

Added by jaikar on Tue, 07 Jul 2020 18:08:09 +0300

Canvas Getting Started 6 requestAnimationFrame for Animation

The learning resources for this article come from "Graphics, Animation and Game Development of HTML5 Canvas Core Technologies" Try not to use setInterval and setTimeout to animate, but rather use the requestAnimationFrame() method to let the browser decide the frame rate on its own. Because browsers differ in the implementation of ...

Added by dawho9 on Tue, 07 Jul 2020 17:40:43 +0300

UILabel for Masonry Learning

First see the effect: Code: - (id)init { self = [super init]; if (!self) return nil; // text courtesy of http://baconipsum.com/ self.shortLabel = UILabel.new; self.shortLabel.numberOfLines = 1; self.shortLabel.textColor = [UIColor purpleColor]; self.shortLabel.lineBreakMode = NSLineBre ...

Added by vijdev on Mon, 06 Jul 2020 18:35:20 +0300