oracle Basic Knowledge Accumulation - Create Packages and Packages bodies

Scene: Basic Knowledge Query Motivation: Pure basic knowledge is accumulated to facilitate follow-up inquiries. In many occasions, people in charge are talking about going to IOE. Therefore, inevitably, the use of occasions will be more or less reduced, so according to the customary thinking record. ...

Posted on Thu, 03 Oct 2019 16:29:49 -0700 by bough

Simple calendar

Simple calendar is a meaningful case. Although it is a small demo, it covers a lot of knowledge. Need to calm down to understand, fully understand, you will feel less difficult, understand this demo, follow-up many things know how to write. Okay, let's start with the HTMl code. 1 <body> 2 <div id="tab" class="calendar"> ...

Posted on Thu, 03 Oct 2019 01:23:33 -0700 by gbow

CF--C. Amr and Chemistry -- Bit Operations | | BFS Implicit Graph Search (Queue Clearance Marker Replaces memset)

C. Amr and Chemistry time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Amr loves Chemistry, and specially doing experiments. He is preparing for a new interesting experiment. Amr has n different types of chemicals. Each chemical i h ...

Posted on Wed, 02 Oct 2019 13:36:11 -0700 by VenusJ

leedcode No. 13 Roman numeral to integer

subject The Rome numbers contain the following seven characters: I,V,X,L,C,D and M character numerical value I 1 V 5 X 10 L 50 C 100 D 500 M 1000 For example, the number 2 is written II, that is, two parallel 1. Write XII, that is X+II. Write XXVII, that is XX+V+II. Usually, a sma ...

Posted on Wed, 02 Oct 2019 10:33:21 -0700 by Kaitosoto

JSCPC I Neko and tree tree dp + prefix and optimization

The idea is to give you a tree, and then there are some key nodes on it, and count how many options to select the set of points, so that in this set, the distance between any two nodes is less than or equal to k. We consider that f [i] [j] f [i] [j] f [i] [i] [j] f [i] [j] denotes the total number of sc ...

Posted on Mon, 30 Sep 2019 12:28:02 -0700 by Matt Parsons

Members like Python Introduction

1. Private members of a class: Private: Own only by oneself Private content begins with _____________. There are two forms for members of each class: - Public members, accessible anywhere - Private members can only be used within a class Private and public members have different access restrictions: Static fields (static properties) ...

Posted on Fri, 27 Sep 2019 01:44:04 -0700 by GundamSV7

rocketmq-transaction message

Move on for more My blog Preface I have reprinted an article about it before. Ultimately Consistent MQ Implementation of Distributed Transactions At that time, the article also encounters the situation of distributed transaction. Finally, according to the idea of the article, it uses rmq to achieve th ...

Posted on Thu, 26 Sep 2019 05:16:14 -0700 by devofash

Python tkinter -- Chapter 18 Polygons of Canvas Controls

18.2.19 create_polygon(coords, **options) Draw a polygon on the canvas according to the coordinates given by coords. (1) coords: coordinates of a given polygon (2) options: the specific meaning of options: option Meaning activedash Draw dotted borders when the mouse passes over a polygon object ...

Posted on Thu, 26 Sep 2019 04:01:07 -0700 by joad

Patent Network Digital Verification Code Recognition

1, background Project Requirements: Identify Patent Web Query Page Digital Verification Code Patent Search Website: http://cpquery.sipo.gov.cn/ The project needs to crawl the website. The landing page of the website is as follows: Figure 1 Home page login When public queries are logged in, the ...

Posted on Wed, 25 Sep 2019 05:05:36 -0700 by jug

Algorithms (an article on greed)

In the past two years, what is the most popular thing is artificial intelligence. Schools, courses, companies and even training institutes are flocking to it. This kind of behavior is not bad. But when people all come in, their real market, real landing, real value and real demand force wave after wave ...

Posted on Wed, 25 Sep 2019 04:21:54 -0700 by callesson