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Tag: operation

SurfaceView clears Canvas how to operate

public void < span class="hljs-title">ClearDraw(){ Canvas canvas = null; try{ canvas = surfaceHolder.lockCanvas(null); canvas.drawColor(Color.WHITE); canvas.drawColor(Color.TRANSPARENT, PorterDuff.

September 26, 2021By Simo Surface canvas, empty, How, operation, SurfaceViewLeave a Comment

File operation

Contents

The so-called “file” is a unit defined in our computer for the purpose of realizing a certain function or part of a certain software function.

The memory cannot store data perm

September 25, 2021By Simo Network Hardware file, operationLeave a Comment

Basic operation of file

1. The concept of files The computer’s files are stored in some kind of A section of data on long-term storage devices Long-term storage devices include: hard drives, USB flash drives, mobile har

September 25, 2021By Simo Network Hardware Basic, Document, operationLeave a Comment

DAY-08 file operation

Three kinds of strings span> 1. Ordinary string: u’Using characters as output unit’

print(u’abc’) < span style="color: #008000;"># for display 2. Binary character string: b’Binary character

September 24, 2021By Simo Network Hardware Day, file, operationLeave a Comment

MacOS – Run SWI Prolog through the terminal MAC

I am trying to run prolog from the terminal. I have installed version 7.2.2 and added it to my environment path using the following command:

PATH=$PATH:/Applications/SWI-Prolog.app/Contents/M

September 24, 2021By Simo Macbook Mac, MacOS, operation, Prolog, SWI, TerminalLeave a Comment

STM32 single-chip serial port one-click download circuit and operation method detailed

The storage media corresponding to the three boot modes of STM32 are all built-in chips. They are:
1) User flash memory = Flash built into the chip.
2) SRAM = The RAM area built into the chip is

September 24, 2021By Simo Motherboard circuit, detailed, download, method, one-button, operation, serial port, single chip, STM, STM32Leave a Comment

Is there a problem with the JavaScript unsigned shift operator on the iPad?

I accidentally ran into the Safari JavaScript engine which seems to be a very strange bug on the iPad.

Unsigned shift operator>>> It should be a number shifted to the right. I encountered som

September 23, 2021By Simo Ipad inquiry, iPad, JavaScript, operation, problem, shift, unsignedLeave a Comment

Why is PowerDesigner successfully generated a table to Oracle, use SQL operation prompt table or view does not exist

The Oracle database and generator database are successfully designed in powerdesigner. You can see the generated tables with PLSQL Developer, but when you add, delete and modify these tables or seq

September 22, 2021By Simo Power Designer Generation, operation, Oracle, PowerDesigner, Present, SQL, Success, table, Tip, view, whyLeave a Comment

I can’t run jobs on PGAgent on PostgreSQL.

I installed pgagent on Ubuntu 16.04.

I executed:

CREATE EXTENSION pgagent;
CREATE LANGUAGE plpgsql; According to this: https://www.pgadmin.org/docs/pgadmin4/1.x/pgagent_install.htm

<

September 21, 2021By Simo Postgresql Homework, operation, PGAGENT, PostgreSQL, UnableLeave a Comment

Jetty 9 actual combat installation operation deployment.

When I first came into contact with jetty, I searched for information on the Internet. Many of them introduced version 1.6. However, The later versions after 1.7 are quite different from the previo

August 22, 2021By Simo Jetty actual combat, deployment, installation, jetty, operationLeave a Comment

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