>
>
>
this situation is that webpack is not installed in this project. Even if webpack is installed globally, it is not found in the package.json in this project.
perform installation:
$ npm install webpack --save-dev
Then run webpack:
CFNetwork internal error (0xc01a:/BuildRoot/Library/Caches/com.apple.xbs/Sources/CFNetwork/CFNetwork
1
1
Modify the info. The plist
NSExceptionDomains
General error during semantic analysis: Unsupported class file major version 57
java.lang.IllegalArgumentException: Unsupported class file major version 57
at groovyjarjarasm.asm.ClassReader.<init>(ClassReader.java:184)
at groovyjarjarasm.asm.ClassReader.<init>(ClassReader.java:166)
at groovyjarjarasm.asm.ClassReader.<init>(ClassReader.java:152)
at groovyjarjarasm.asm.ClassReader.<init>(ClassReader.java:273)
Appear this error is your JDK version is wrong, general RN ask JDK version is 1.8, recommends after installation, the project of the android/gradle. Add the following configuration properties
org. Gradle. Java. Home =/Volumes/Mac/Software/android \ Studio app/Contents/jre/JDK/Contents/home
Problem description
Count_bind = rbind(count_left,count_right)
Error in match.names(clabs, names(xi)) : names are not relative to existing names
To explore the reason
This is a problem in the match.names function that occurs during rbind, for the simple reason that my first two objects to be rbind have different column names:
To solve the problem
Manually changing the column name can solve the problem:
colnames(count_left) <- c("AAA")
Use the above function to execute the two objects separately, and just change the column name.
Big mouth a
I’ve never really understood why data.frame cannot set the column name when declared but can set the row name. Below is the official usage, only for row row.
The data frame (… , row.names = NULL, check.rows = FALSE,
check.names = TRUE, fix.empty.names = TRUE,
stringsAsFactors = default.stringsAsFactors())
In this way, I often have to manually name the column names of the data box. Usually, the code I write is genetic data, so as to ensure the accuracy of the column names. However, it would be troublesome to write small codes for statistics
Welcome to communicate
The computer was upgraded to 10.13.1, and Xcode was upgraded to Xcode9.1. But when the original operation was ok, swift Stdlib tool error was reported, and DerivedData was searched, re-Pod install, and deleted. The last time I saw a restart, another error occurred after the restart
baidu again, said to set the key string certificate to always trust, the result is still not believe
\end{lstlisting} don’t add a newline after it!! \
Anaconda Navigator opens the following web page:
solution:
1. Run with the administrator: Anaconda Prompt
2. Conda update anaconda-navigator
this command may cause the following error:
InvalidTypeError: Parameter _channels = ‘- https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/main/ – https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud/bioconda/ declared in C: \ Users \ 12270 condarc has type STR.
Valid types:- tuple
Solution: Find the.condarc file under C:\Users\username folder and change it to the following:
channels:
- https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/free/
- https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/main/
- https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/free/win-64
- https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/free/noarch
- https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/main/win-64
- https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/main/noarch
show_channel_urls: true
3. Conda update anaconda-navigator
sudo chmod +t /tmp
In the afternoon, I tried to build a private ethereum chain, and then an error was reported when I joined the node. The error was reported as follows:
INFO [06-09|16:44:36.966] Block synchronisation started
INFO [06-09|16:44:36.973] Imported new block headers count=0 elapsed=2.059ms number=265 hash=436ce2…310d57 age=27m26s ignored=63
WARN [06-09|16:44:36.975] Node data write error err="state node 80477e…d1c7e3 failed with all peers (1 tries, 1 peers)"
WARN [06-09|16:44:36.976] Synchronisation failed, retrying err="state node 80477e…d1c7e3 failed with all peers (1 tries, 1 peers)"
INFO [06-09|16:44:46.970] Imported new block headers count=0 elapsed=1.040ms number=265 hash=436ce2…310d57 age=27m36s ignored=63
WARN [06-09|16:44:46.972] Node data write error err="state node 80477e…d1c7e3 failed with all peers (1 tries, 1 peers)"
WARN [06-09|16:44:46.973] Synchronisation failed, retrying err="state node 80477e…d1c7e3 failed with all peers (1 tries, 1 peers)"
INFO [06-09|16:44:56.970] Imported new block headers count=0 elapsed=1.040ms number=265 hash=436ce2…310d57 age=27m46s ignored=63
WARN [06-09|16:44:56.971] Node data write error err="state node 80477e…d1c7e3 failed with all peers (1 tries, 1 peers)"
WARN [06-09|16:44:56.972] Synchronisation failed, retrying err="state node 80477e…d1c7e3 failed with all peers (1 tries, 1 peers)"
INFO [06-09|16:45:06.971] Imported new block headers count=0 elapsed=1.084ms number=265 hash=436ce2…310d57 age=27m56s ignored=63
WARN [06-09|16:45:06.973] Node data write error err="state node 80477e…d1c7e3 failed with all peers (1 tries, 1 peers)"
WARN [06-09|16:45:06.973] Synchronisation failed, retrying err="state node 80477e…d1c7e3 failed with all peers (1 tries, 1 peers)"
INFO [06-09|16:45:16.971] Imported new block headers count=0 elapsed=1.020ms number=265 hash=436ce2…310d57 age=28m6s ignored=63
WARN [06-09|16:45:16.972] Node data write error err="state node 80477e…d1c7e3 failed with all peers (1 tries, 1 peers)"
There was no solution on the error reporting network, and I tried to restart the chain to no avail.
My solution is that USES a non-root account to carry out the chain operation again. If it doesn’t work, delete all the chains and use ordinary users to carry out the operation, mainly because I saw the error of Node data write error, which I suspect is related to the root user's permission.
I did it once with a normal user and it worked...
Python3 teaches by hand
Official Python Manual
The problem
When writing crawlers in Python, I encountered an error of Urlopen:
>>> url = """https://www.google.com.hk/search?newwindow=1&safe=strict&biw=960&bih=430&noj=1&q=django&oq=django
&gs_l=serp.3...664389.664389.0.664921.1.1.0.0.0.0.0.0..0.0....0...1c..64.serp
..1.0.0.cfHP0MSxtWU
"""
... ...
<urlopen error no host given>There are many reasons for this problem. For example, in order to prevent program access, some websites need to add headers, etc., in order to access normally, otherwise this error will be reported.
The solution
In fact, careful friends will find me above the code for elegance, with “” “” “” to continue line, and with the return to the URL path to truncate. So here’s the problem — this is the same as introducing the ‘/n’ character into the original URL string, so the path is wrong, so it won’t open!
As long as you don’t press enter, you can resume the normal use of urllib.request-open.
(Question: But how do you achieve line wrapping in this case?Just use ‘a’ + ‘b’ + ‘c’ ~)
This error occurred in start-s today while porting the Uboot relocation. 