Multidimensional grouping statistics functions include: ROLLUP and CUBE, which are used in the group by clause of general grouping SQL:
GROUP BY (a,b,c):
First grouped according to a, then grouped according to b, and finally grouped according to C. The dimension of grouping is (a,b,c)
GROUP BY R ...
Posted on Mon, 17 Dec 2018 13:27:03 -0800 by incubi
Hello, ladies and gentlemen. Last time we talked about ListView optimization of UI controls in Android. This time we talked about RecyclerView of UI controls. Don't mention gossip, turn right. Let's talk about Android!
Lookers, we introduced the ListView component in the previous chapter. Today we will introduce an upgraded ve ...
Posted on Mon, 17 Dec 2018 04:54:04 -0800 by webpoet
Mandatory Type Conversion
2. Variables are typeless, but they hold typed values. Types define the behavioral characteristics of ...
Posted on Mon, 17 Dec 2018 03:57:05 -0800 by hawleyj
0x01 Running Environment
dapper version 1.50.2
.net framework 4.5
0x02 Problem Description
The entity object contains attributes such as DateTime?, DateTime, int, int?. When using the dapper method IDbConnect. Query <>() method, it prompts the System.InvalidOperationException exception, which is confirmed as the exception caused by D ...
Posted on Mon, 17 Dec 2018 02:00:04 -0800 by agent47
2018-03-01 Data Structure and Algorithms (4)
1.16 Filter Sequence Elements
The simplest way to filter sequence elements is to use list inference. For example:
>>> mylist = [1, 4, -5, 10, -7, 2, 3, -1]
>>> [n for n in mylist if n > 0]
[1, 4, 10, 2, 3]
>>> [n for n in mylist if n < 0]
[-5, -7, -1]
Posted on Mon, 17 Dec 2018 00:21:04 -0800 by Peredy
Three attempts to internationalize my pages (Google Search, translater.js, jquery i18n) This article is original, reproduced please attach my blog link, thank you.
Suddenly, I have to internationalize my project. As a white man, I have made many attempts and achieved some results. I hope this blog can help you. First, the first idea is to int ...
Posted on Sun, 16 Dec 2018 20:21:04 -0800 by Easter Bunny
docker runs consul
docker runs prometheus
docker runs grafana
CentOS 7 Operating System
The latest version of yum
Check the kernel version $uname -r, running docker requires the kernel version to be above 3.10.
$ sudo yum install -y docker
Check if the insta ...
Posted on Sun, 16 Dec 2018 20:06:04 -0800 by jcantrell
1 LayoutInflater for loading layout
LayoutInflater is used to load the layout. The task of loading the layout is usually done by calling the setContentView() method in Activity. In fact, the setContentView() method also uses LayoutInflater to load the layout, but this part of the source code is internal.
Let's first look at t ...
Posted on Sun, 16 Dec 2018 17:21:03 -0800 by Lashiec
Compatibility problem directory
16. The subordinates of IE67 have relative positioning and are larger than their parents. The parent overflow:hidden; the latter can't wrap it up.
17. Floating elements of the same level under IE6 will cover absolute positioning elements
18. If the width and height of the positioning parent are odd in IE6, th ...
Posted on Sun, 16 Dec 2018 16:45:04 -0800 by arisjb
Elastic Search Yellow unassigned_shards recovery replicas node recovery
Elastic search 5.1 cluster has three nodes, two of which are hung up for some reason. After timely restart, the health status of es changed from red to yellow and continued to yellow
Call the health state interface:
GET / ...
Posted on Sun, 16 Dec 2018 16:03:03 -0800 by baruch