without-cra | Configure react without create-react-app | Frontend Utils library
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kandi X-RAY | without-cra Summary
Configure react without create-react-app
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QUESTION
I have a csv
file which is more than 1 GB
in size. Usually this is how I convert a csv
to a table
using pandas
.
ANSWER
Answered 2020-Apr-23 at 16:16The updated docs on iterator
and chunksize
can be found here: Iterating through files chunk by chunk.
So does a chunk size means it reads
n
rows at a time?
Yes.
Your code using chunksize
is mostly correct, you just need to add each chunk to your dataframe.
If all your columns are the same type and don't require any special logic/types, then convert the entire DataFrame instead of doing it column by column. Or, you can specify dtypes
to read_csv
. However, you'd lose access to specify 'coerce'
, so will leave it as is.
For extremely large data, it's better to do the entire read, convert, to_sql in chunks. Also note that it doesn't make sense to use low_memory=False
in that case, use the default True
. You're converting the type later anyway, so a mixed type inference (which is what might happen), won't matter.
QUESTION
I want to profile a selected method in a project that runs in a wildfly server.
When the profiler is setup and the method is called the console will give the following exception:
java.lang.NoClassDefFoundError: org/netbeans/lib/profiler/server/ProfilerRuntimeCPUFullInstr
Steps to reproduce this problem is as following:
- start wildfly server through Netbeans > Services > Servers > start Wildfly
- Profile > Attach to Project
- Setup Attach to Project > select proces (jboss-modules.jar)
- Select Methods to profile
- Select inside Methods to profile "Selected Method"
- add method from own project and apply
- run method, the exception will be thrown and the profiler is disconnected
I'm using Netbeans 8.1 and Wildfly 8.2.
What i've tried so far:
- adding
-Djboss.modules.system.pkgs=org.jboss.byteman,org.netbeans.lib.profiler.server
- http://i-proving.com/2011/07/07/how-to-get-visualvm-to-profile-jboss-without-crashing/ but this gave me the following errors:
/Library/Java/JavaVirtualMachines/jdk1.8.0_121.jdk/Contents/Home/lib/visualvm/profiler/lib/jfluid-server-15.jar: line 1: PK: command not found /Library/Java/JavaVirtualMachines/jdk1.8.0_121.jdk/Contents/Home/lib/visualvm/profiler/lib/jfluid-server-15.jar: line 2:,�*E: command not found /Library/Java/JavaVirtualMachines/jdk1.8.0_121.jdk/Contents/Home/lib/visualvm/profiler/lib/jfluid-server-15.jar: line 3:+�*E���+BBMETA-INF/MANIFEST.MFManifest-Version:: No such file or directory /Library/Java/JavaVirtualMachines/jdk1.8.0_121.jdk/Contents/Home/lib/visualvm/profiler/lib/jfluid-server-15.jar: line 4: Ant-Version:: command not found /Library/Java/JavaVirtualMachines/jdk1.8.0_121.jdk/Contents/Home/lib/visualvm/profiler/lib/jfluid-server-15.jar: line 5: syntax error near unexpected token
(' /Library/Java/JavaVirtualMachines/jdk1.8.0_121.jdk/Contents/Home/lib/visualvm/profiler/lib/jfluid-server-15.jar: line 5:
Created-By: 1.7.0_45-b18 (Oracle Corporation) - I also tried to start wildfly in profile mode but this hangs after:
Profiler Agent: Waiting for connection on port 5140 (Protocol version: 16)
ANSWER
Answered 2017-Jun-14 at 12:08This should be fixed soon in the nightly builds. Otherwise if you don't want to use the nightly, this is what you'd need to do on your WildFly instance to be able to connect the profiler to it and profile your method. In standalone.sh you will need to update certain options :
- append jfluid-server.jar to the bootclasspath (or you could change the command line to use -classpath jboss-modules.jar:jfluid-server.jar org.jboss.modules.Main instead of -jar jboss-modules.jar)
- add the jfluid package to the system.pkgs like this : jboss.modules.system.pkgs=org.jboss.byteman,org.jboss.logmanager,org.netbeans.lib.profiler.server
- add the -Xverify:none to avoid error messages
QUESTION
I have developed a dashboard using R and the library shiny, where some different charts are displayed. These ones aren't static charts but they are generated dynamically according to some filters you can set through some bottons and so on.
The next step, what I am working on right now it would be to create a powerpoint report including those charts I have generated before. I got this piece of code so far:
...ANSWER
Answered 2017-May-31 at 10:12ReporteRs
does not support htmlwidgets. addPlot
work with base plot commands, ggplot2, grid and lattice.
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