immutables | A high-performance immutable mapping type for Python | Functional Programming library
kandi X-RAY | immutables Summary
kandi X-RAY | immutables Summary
A high-performance immutable mapping type for Python.
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Community Discussions
Trending Discussions on immutables
QUESTION
Java records are used to implement shallowly immutable data carrier types. If the constructor accepts mutable types then we should implement explicit defensive copying to enforce immutability. e.g.
...ANSWER
Answered 2021-May-19 at 13:59You can do it already, the arguments of the constructor are mutable:
QUESTION
All of my virtual environments work fine, except for one in which the jupyter notebook won't connect for kernel. This environment has Zipline in it, so I expect there is some dependency that is a problem there, even though I installed all packages with Conda.
I've read the question and answers here, and unfortunately downgrading tornado to 5.1.1 didn't work nor do I get ValueErrors. I am, however, getting an AssertionError that appears related to the Class NSProcessInfo.
I'm on an M1 Mac. Log from terminal showing the error below, and my environment file is below that. Can someone help me get this kernel working? Thank you!
...ANSWER
Answered 2021-Apr-04 at 18:14Figured it out.
What works:
QUESTION
I want to call a rest api with react-redux but my fetch doesn't called at all.
My actions:
...ANSWER
Answered 2021-Mar-27 at 11:15First of all define your rest api function like below
QUESTION
I try to implement immutable class, and I see a rule stating "Perform cloning of objects in the getter methods to return a copy rather than the returning actual object reference".
I understand that when we use immutables there would be no change in copied / cloned collections returned from the getters. When we use custom classes, the change in original collection can be seen also cloned ( shallow copied ) collection return from the getters.
In below code, I could not understand the case :
I created two methods, one for return the original collection as courseList and one for shallow copy of the courselist.
I assigned two version to local references clist1 and clist2.
Then I changed the item in original list. I can see the change original list and copied list also when I reach them through student object. However the change cannot be seen throug the reference I pointed to the cloned course list before ! I think it should also be affected by the change. Why I cant see the change on previously copied version ? This is reference and I think it should be point the same memory area, I also check the result by another example below again. I created a list containing StringBuilder. I appeded new strs to stringbuilder and then I can see the changed previously copied version of the list.
So, the main question, must I use the deep copy in immutable classes always ? Is this a wrong usage ? What would be the safe way to use collections in immutable classes ?
Thanks in advance.
ImmutableStudent.java
...ANSWER
Answered 2021-Feb-07 at 12:04From the clone()
Javadoc:
Returns a shallow copy of this ArrayList instance. (The elements themselves are not copied.)
What this means is that the reference returned by the clone
method is actually a reference to a new instance of ArrayList
that contains exactly the same elements as the original list. In an example:
QUESTION
I have a laptop with Windows 10 Pro and I'm trying to install Rasa 1.6.0
When I try to run the command pip install rasa==1.6.0 --no-cache-dir
, I get the following error:
ANSWER
Answered 2021-Jan-07 at 08:40You're trying to install an old version of Rasa, one that currently isn't supported anymore and which therefore can have incompatible dependencies. At the time of writing Rasa is at version 2.2 and it's best to install via;
QUESTION
What do?,I can't install the library,vkbottle,an error appears,bot on Python?
...ANSWER
Answered 2020-Dec-16 at 15:37I don't understand you exact query.
You said you can't install the library and I can see, you trying to import vkbottle. Have you tried to install the library.
Try using the command: pip install vkbottle
[Make sure you python environment is active or you can use pip in you terminal or cmd]
QUESTION
Been trying to set up the Immutables library but despite following the guide Eclipse doesn't seem to be generating any classes in the target/generated-sources/annotations folder
here's a screenshot of the java compiler -> Annotation Processing settings
And of the Factory path showing that the Immutables value-2.8.2.jar is selected as per the Immutables guide -- https://immutables.github.io/immutable.html.
I've run Project -> Clean and then Project -> Build All
and I get an error in the Error log of: Exception thrown by Java annotation processor org.immutables.processor.ProxyProcessor@63924c86
and the corresponding stack trace
...ANSWER
Answered 2020-Dec-10 at 15:14Your immutables jar is too new or too old (or the Java version that you use to run your eclipse on is too new or too old).
You can check that java version in eclipse: Find the 'about eclipse' option (under the Eclipse menu on macs, and I think it's under 'help' on other OSes), then pick the configuration tab. Check for the java.home=....
entry in there, that'll be pointing at the JVM used to start eclipse itself. That is throwing out those errors, or, the immutables system ships with an internal compiler (and ecj is usually the java parser that projects use, as it is fast and open source), in which case that's the one that is throwing out the errors. It's hard to tell from the stack track which one's at fault.
So, I'd check the version of your immutables dep, and if it's very old, update it. Then I'd check the VM you're running eclipse on, and if it's very old, update that.
Actually, I'd ditch immutables and just use lombok, but then, I would :P
QUESTION
I keep on wondering why IntelliJ cannot detect the classes which are auto-generated by Immutables:
The code for the RemoteEntityACL
is this:
ANSWER
Answered 2020-Oct-20 at 09:46Updating to latest version should help fix this:
QUESTION
In C#, are the .Values and .Keys in a ImmutableSortedDictionary guaranteed to be sorted, please?
The following code:
...ANSWER
Answered 2020-Oct-12 at 11:51Seemingly it just uses a linq Select
statement to get an Enumerator for the Keys and Values as found in the implementation source. So that would garantuee all 3 statements to be sorted as one also would expect from its class name.
QUESTION
We are using Immutables with MapStruct and ran into a problem while converting an entity to dto.
...ANSWER
Answered 2020-Oct-15 at 06:26Looking at the title of the question "Inner immutable class with mapStruct" I guess that your immutable classes are inside another class.
This is a known problem for MapStruct (see mapstruct/mapstruct#2198) that already has a PR for it and it will be fixed in the next non patch release.
In the meantime you will have to make your Immutable classes top level classes.
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