Have a problem
When running the code, the following error prompt appears:
AttributeError:'Rectangle' object has no property 'normed'
resolvent
The reason is that the library has been updated and there is no such attribute. Delete the normal in the code (no error, but it seems that it can’t be drawn)
Replace the normal attribute in the code with density , and add an attribute stacked = true .
Thank you for your comments.
Syntax error: unexpected token in uni app project compilation
Contents of articles
Syntax error: unexpected token error content error reason solution for uni app project compilation
Error content
Originally, it could run well. When it was pulled down and then run to wechat applet, it would report an error, but the web side could run normally~
Module build failed (from ./node_ modules/mini-css-extract-plugin/dist/ loader.js ):
The details are as follows:
Cause of error
None of the solutions found in the search work.
After a careful examination of the code, it is found that the & lt; script & gt; tag appears twice in a newly modified Vue file. The new one is used to describe the style,
Solution
The problem is solved by merging the content in the new & lt; script & gt; into the & lt; style & gt; tag
Note that there can only be three top-level tags in uni app!!
The root of the problem is that the team didn't communicate well, so there was a problem.. But uni app really has a lot of holes!!!!
On the CentOS system, an error is reported when using the yum command to install the package
rpmdb: Thread/process 6539/140448388269824 failed: Thread died in Berkeley DB library
error: db3 error(-30974) from dbenv->failchk: DB_RUNRECOVERY: Fatal error, run database recovery
error: cannot open Packages index using db3 - (-30974)
error: cannot open Packages database in /var/lib/rpm
CRITICAL:yum.main:The reason is that the RPM database is damaged
Restore to normal after rebuilding the database:
cd /var/lib/rpm/
for i in `ls | grep 'db.'`;do mv $i $i.bak;done
rpm --rebuilddb
yum clean all
Recently, error loading password’s fault file is always reported when opening excel, which is puzzling. However, xlsx file can still be opened, and I didn’t care about it.
However, it is not enough to import xlsx file as data.
Then, after carefully reading the error information, we found that it was MySQL for Excel. What the hell?How did excel get into MySQL.
So find out what’s wrong with MySQL, and then go online.
Finally, I found that when MySQL was installed, there was a component named MySQL for Excel.
Since there is a problem with MySQL for Excel and it can’t be used now, it’s time to unload it.
So, open MySQL installer, check MySQL for Excel (pay attention not to check other, otherwise it’s not good to unload MySQL), and choose Remove. It’s really a good thing.
OK, open excel and never report this error again
Duplicate entry ‘1’ for key ‘PRIMARY’
Error reason: primary key conflict, primary key value is unique
solution: the value of ‘primary’ primary key cannot be the same
Example:
1. View the table structure
2. View data
3. Add data, add id = 1, and an error will be reported, because ID is the primary key with uniqueness
Solution: if the value of ID is modified, the addition is successful
Using keil software to report syntax error near ‘; ”
This is the first time through CSDN upload their own learning situation, novice report.
Today, when using keil to write C, I used a piece of such code
?Define uint unsigned int; void delay (uint MS) { uint a; while (MS --)// software delay module for (a = 0; a & lt; 114; a + +); }
When compiling, a syntax error near ';' was given, and the following MS and a both reported an error that no identifier was defined.
From the code above, it can be seen that there is an obvious error with the ";" sign after define, but I found that the line with syntax error near ';' error is void delay (uint MS).
I was hoodwinked at that time, looking for a long time, I found that there was an extra "; to commemorate this stupid operation.
Error 1045 (28000): access denied for user ‘root’ @’localhost ‘(using password: no)
The solution steps are as follows:
1. First stop the database service: systemctl stop mariadb.service
2. Use mysqld_ Safe to start mysqld server: mysqld_ safe –user=mysql –skip-grant-tables –skip-networking &
Display: exit Ctrl + C
3. Login: MySQL – U root mysql
4. Modify the password of the root user: update user set password = password (‘newpassword ‘) where user’s root’;
5. Use the modified root user and new password to log in to the database: MySQL – uroot – P
The MariaDB server is running with the –skip-grant-tables option so it cannot execute this statement
An error occurred when creating a user. The execution statement is:
GRANT ALL PRIVILEGES ON *.* TO helei IDENTIFIED BY ‘MANAGER’ WITH GRANT OPTION;
Solution: MySQL & gt; flush privileges;
Reference: MariaDB initial login error 1045 (28000) solution
https://blog.csdn.net/carry9148/article/details/52252780
POM file error due to springboot version problem:
After revision:
Copyright notice
Original author: brother Gu’s younger brother author blog address: http://blog.csdn.net/lfdfhl
Problem description
When installing Python 3.7.2 in win10 device, an error is reported: the error code is 2503, as shown in the figure below:
Solution
Just modify the permissions of the folder C: Windows: temp.
The first step: find the folder C: Windows: temp
Step 2: open the temp folder and edit its permissions
Step 3: change its permissions to full control
Error configuring application listener of class jdbc.ContextListener One of the solutions
In the process of developing with MyEclipse + Tomcat 5.5 these two days, this error message suddenly appeared when starting the project. The previous two days have been good. How can this problem suddenly appear?I still doubt whether the computer is poisoned.
The error message is as follows
2011-4-26 14:39:52 org.apache.catalina.loader.WebappClassLoader validateJarFile
Message: validateJarFile(E:\java\Tomcat5\webapps\pmis-center\WEB-INF\lib\servlet-api.jar) - jar not loaded. See Servlet Spec 2.3, section 9.7.2. Offending class: javax/servlet/Servlet.class
2011-04-26 14:39:53,843 ERROR [org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/center]] - <Error configuring application listener of class jdbc.ContextListener>
java.lang.Error: Unresolved compilation problems:
The hierarchy of the type ContextListener is inconsistent
Implicit super constructor Object() is undefined for default constructor. Must define an explicit constructor
The type java.util.EventListener cannot be resolved. It is indirectly referenced from required .class files
at jdbc.ContextListener.<init>(ContextListener.java:4)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at java.lang.Class.newInstance0(Class.java:355)
at java.lang.Class.newInstance(Class.java:308)
Before that, we also reported WEB-INF/lib/servlet- api.jar Error in not loaded. See servlet spec 2.3, section 9.7.2
Before looking for a long time on the Internet, there is a problem servlet- api.jar Later, all the methods were tried, even the system was reinstalled, but it didn’t work. Finally, I calm down and take a look at the JRE package content in the running environment of MyEclipse. I found that all the jar packages are JDK jars. Change the jar package and recompile it. The result is good.
Remind yourself of this problem. The problem is often in the most trivial place. If you find the problem, you will get something if you think about what changes you have made before.
NPM run build error in static/JS/ balabala.js from UglifyJs
The project added a small requirement, and an error was reported when it was ready to be deployed to the developer for testing.
ERROR in static/js/1.e54ac17.js from UglifyJs
Unexpected token: name (FusionClass) [static/js/1.e54ac17.js:55,6]
ERROR in static/js/vendor.bd8bfa0.js from UglifyJs
Unexpected token: name (ret) [static/js/vendor.bd8bfa0.js:11551,6]From the error message, we can see that the syntax of ES6 in JS has not been converted to Es5. I think a new dependency has been added. It may be that part of the syntax of ES6 is used in the dependency, but there is no escape.
{
test: /\.js$/,
loader: 'babel-loader',
options: {
presets: ['es2015']
},
include: [resolve('src'), resolve('test')]
}The above is the configuration of webpack. It can be found that the ES6 conversion in the dependency file is not supported, so we can write in the new dependency.
{
test: /\.js$/,
loader: 'babel-loader',
options: {
presets: ['es2015']
},
include: [resolve('src'), resolve('test')， resolve('/node_modules/your package')]
}Just repack it.
rm -rf /usr/local/etc/bash_completion.d/brew rm -rf /usr/local/share/zsh/site-functions/_brew rm -rf /usr/local/share/man/man1/brew.1 rm -rf /usr/local/share/doc/homebrewbrew updateymdeMacBook-Pro:~ ym$ brew updateAlready up-to-date.
brew update # Update Homebrew's information
brew outdated # See which software can be upgraded
brew upgrade <xxx> # If you don't want to upgrade all of them, then upgrade the specified ones like this
brew upgrade; brew cleanup # If you want to upgrade them all, just upgrade them and clean them up