I'm playing around with most recent Haskell platform (2013.2.0.0) on Windows trying to create a simple but fast concurrent socket server. I'm trying to base my work on examples here: http://www.haskell.org/haskellwiki/Simple_Servers
That sample, however, doesn't not compile complaining that it
Could not find module `System.Event'
After some googling I've found out that all declarations from that module were moved to GHC.Event, which has a remark in its documentation about being 'GHC internal'. Indeed, when i try to import GHC.Event I get the same error
Could not find module `GHC.Event'
How should I be supposed to import useful functions such as registerFd and friends? Is there anything I'm missing in my cabal file? I've got the following:
build-depends: base ==4.6.*, hslogger == 1.2.3, time == 1.4.0.*, old-locale, network == 2.4.1.2
Related
First allow me to say, I am trying to learn Databricks but have years of Data Factory and ETL experience. I got some code that uses AIS data to map logistics movements.
The code uses Uber libraries for H3Core functionality. I did see a demo of this code on a coworkers laptop so I know it CAN work.
I am having trouble finding the uber objects. I assume this is a newbie thing. I imagine my problem is environmental.
I cannot post all the code but the include lines that are throwing the error:
import com.uber.h3core.H3Core
import com.uber.h3core.util.GeoCoord
import com.uber.h3core.LengthUnit
Those lines produce the following errors on execution:
command-2206228078162026:1: error: object uber is not a member of package com
import com.uber.h3core.H3Core
^
command-2206228078162026:2: error: object uber is not a member of package com
import com.uber.h3core.util.GeoCoord
^
command-2206228078162026:3: error: object uber is not a member of package com
import com.uber.h3core.LengthUnit
^
Below I think it is trying to reference objects created with missing class libraries for H3Core:
command-2206228078162026:15: error: not found: value H3Core
val h3 = H3Core.newInstance()
^
command-2206228078162026:26: error: not found: value H3Core
val h3 = H3Core.newInstance()
^
I have also had similar issues, usually occurring when the size of the jar is a little bigger where in the notebook starts running before the jar is fully loaded. But I have not been able to reproduce it consistently. (So don't quote the answer on it.)
Couple of Options we have tried. Please validate and see if it work for you.
Have the jar available on the DBFS path and then install it from DBFS as a dependent library at the job level. Please refer to the link - Dependent-Libraries
We have seen that sometimes even this fails. If it is possible, you can check if the library has been loaded and sleep and then check again. Not sure how you would do that in scala.
Please validate what works....
Cheers...
The error occurs when I use the library in another library.
Library import is working fine in the app but not working within libraries.
And not able to generate the build of a library.
All libraries are publishable.
Error:
Nrwl.v13 Files Structure within lib folder:
Very difficult to debug. It can be related to circular dependency issue. Are you sure you don't import code from library which import code from the same library ?
A import B
B import A
If this is the case, you should handle this by creating a C library which will be imported by A and B or find a solution for the A or B which will not depend on each other.
Code example will be helpful for help you.
From https://github.com/nrwl/nx/issues/10785#issuecomment-1158916416:
There seems to have been an issue with a migration that was scheduled
for a version but the migration itself was released in another
version, so that might have caused the migration to not run in some
scenarios. That migration should have added the following in nx.json
for anyone having their nx.json extending from
nx/presets/core.json or nx/presets/npm.json:
{
...
"pluginsConfig": {
"#nrwl/js": {
"analyzeSourceFiles": true
}
}
}
Could you please add the above snippet to your nx.json and try again? If after applying the change it doesn't pick
it up immediately, run nx reset and then try again.
This didn't work for me though, so I opened nx issue #11583: library importing other library using wildcard path mapping fails with "is not under 'rootDir'"
I had this issue in one of our monorepo and it was caused by the fact that one of our library's name wasn't valid. We had something like #organisation/test-utils/e2e which we ended up renaming to #organisation/test-utils-e2e (take note of the / usage).
I'm using the assistant proof COQ, my first question would be about the Induction.v file, why do we use Require Export Basics, instead of Require Import basics? Also why does it work when we make Export basics.v, even if I changed the name of basics to Mybasics.v?
What does Require Export Basics. do? Does it import or export?
I tried to execute lists.v after compiling the induction.v but it doesn't work, it says
Unable to locate library Induction.
How can I fix that?
Are you working on software foundation? You need to add the folder to COQPATH. since proof general has handled that, i bet you are using coqide, aren't you?
The rest of your question can all be resolved by consulting the coq ref manual: https://coq.inria.fr/refman/toc.html .
The difference between Require Import and Require Export can be found here: https://coq.inria.fr/refman/vernacular.html#hevea_command115
Providing more information about compilation (e.g. whether you were using command line or code editor, Coq version, textbook version etc.) could be useful for resolving your issue.
I'm new to flash development, so I'm watching a tutorial on how to use FlashDevelop. The video recommended I use Box2D and explained how to use it as a global classpath, which I have done.
I was messing around with the code using what the person in the video was showing, just trying to get an output. As I typed, FlashDevelop was adding in the import statements for me.
import Box2D.Collision.Shapes.b2CircleShape;
import Box2D.Common.Math.b2Vec2;
import Box2D.Dynamics.b2BodyDef;
import Box2D.Dynamics.b2FixtureDef;
import Box2D.Dynamics.b2World;
import Box2D.Dynamics.b2Body;
When I run the program though, it's returning this:
col: 31 Error: Definition Box2D.Collision.Shapes:b2CircleShape could not be found.
It's returning a variation of that for each import.
I've checked and the files are indeed there. I'm really not certain what this could be; it's possible I just missed a step.
Any ideas?
(Sorry if I formatted this question incorrectly, I'm new to this site.)
It's maybe cause you are using an old version
I think these are your choices :
1) you have to do an update
or
2) use "b2CircleDef"
See the code source in this link the change are commented
http://www.emanueleferonato.com/2010/01/27/box2dflash-2-1a-released-what-changed/
Hope that was helpful !
Good luck
I'm in the midst of trying to create my own radon transform function, for which I need to rotate the simple image I've created. According to the documentation, the function is in scipy.misc.
However,
from scipy.misc import imrotate
gives me "could not import name imrotate"
and
import scipy.misc
scipy.misc.imrotate(myImage,theta)
says that scipy.misc does not have a module named 'imrotate' when I try to call the function.
I've tried removing the '--pylab inline' arguments from my launch, and I've made sure the PIL/Image libraries aren't imported, because I've heard that there were problems with that in other threads, but nothing seems to make it work.
I've gotten around it for now by using a different suite, the scikit-image library, but I'd prefer to use the scipy version if I can, because it's more commonly used.
scipy.misc.imrotate requires the library PIL and I guess that is your problem. Ether it is not installed at all or not installed correctly.
You can use scipy.ndimage.interpolation.rotate instead.