When writing mysql statement with mybatis, we encountered the problem of 1-to-many relationship
First look at the relationship:
Based on table A, A record in table A corresponds to A record in table B, while A record in table A corresponds to n records in table C. then table B and table C are 1-to-1. The query statement at this time is:
Posted on Mon, 04 May 2020 08:17:15 -0700 by kneifelspy
Jane book: https://www.jianshu.com/p/8189f4da31f6
Meet a demand: draw polygon area on Gaud map
What else can we do Goldmaps sdk reference manual , found a way:[ addPolygon(PolygonOptions options)]
public final Polygon addPolygon(PolygonOptions options)
Add a polygon object to the map.
Understand the main categ ...
Posted on Thu, 16 Apr 2020 07:56:33 -0700 by newb110508
Code can be viewed directly if the foundation is good
1. Open Google explorer and enter the website: [https://www.amap.com/] to access the Google Maps (https://www.amap.com/)
The second step:
2. Press F12 on the keyboard to enter the developer ...
Posted on Tue, 18 Feb 2020 04:31:49 -0800 by caedo
In Python multiprocessing libraries, is there a variation of pool.map that supports multiple parameters?
text = "test"
def harvester(text, case):
X = case
if __name__ == '__main__':
pool = multiprocessing.Pool(processes=6)
case = RAW_DATASET
Posted on Sat, 01 Feb 2020 07:10:31 -0800 by victor78
Target realization Description: after the user sends the HTTP request, the background Controller layer obtains the corresponding parameters after receiving the request, splices the parameters into the corresponding third-party interface, establishes the connection, sends the request to the third-part ...
Posted on Sat, 18 Jan 2020 06:45:41 -0800 by tail
Apply for developer qualification in Golden Map Development, then create a new application in the console to get KEY;
Create a new template HTML file;
Posted on Fri, 17 Jan 2020 08:14:52 -0800 by forumsudhir
When it comes to weather forecast service, our first reaction is a very simple service. At present, there are a large number of weather forecast APIs that can be used directly on the Internet. Is it necessary to use knight to develop a set of weather forecast APIs? A knife for killing chickens? Don't worry. Let's take a look at the actual scena ...
Posted on Sat, 07 Dec 2019 08:21:03 -0800 by shonuff
There are many types of covers on the Gaud map. Recently, circle covers are used. Record them by the way
Go straight to the case
<meta http-equiv="X-UA-Compatible ...
Posted on Thu, 05 Dec 2019 09:28:51 -0800 by webpoet
The interfaces exposed in the current project are basically rest APIs. When docking with other projects, they usually call the rest api [http interface] exposed by the other party. This involves sending http requests in your own projects.How to call http request: you can use httpclient or other native methods to build http request. spring also ...
Posted on Tue, 26 Nov 2019 10:25:17 -0800 by reddrum
A few days ago, the United black card fed back a need to open Baidu APP or Gaode APP in H5, so I checked relevant documents on the Internet and put a link below: 1 Gould map 2.Baidu Maps
The specific idea is to click and select the map, first request APP link, no response after 800 ms, and then jump to H5 link. One of the disadvantages of th ...
Posted on Sat, 09 Nov 2019 12:02:17 -0800 by jl