inherit | Inheritance module for Node.js and browsers
kandi X-RAY | inherit Summary
kandi X-RAY | inherit Summary
Inheritance module for Node.js and browsers
Support
Quality
Security
License
Reuse
Top functions reviewed by kandi - BETA
Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of inherit
inherit Key Features
inherit Examples and Code Snippets
Community Discussions
Trending Discussions on inherit
QUESTION
I understand that after calling fork() the child process inherits the per-process file descriptor table of its parent (pointing to the same system-wide open file tables). Hence, when opening a file in a parent process and then calling fork(), both the child and parent can write to that file without overwriting one another's output (due to a shared offset in the open-file table entry).
However, suppose that, we call open() on some file after a fork (in both the parent and the child). Will this create a separate entries in the system-wide open file table, with a separate set of offsets and read-write permission flags for the child (despite the fact that it's technically the same file)? I've tried looking this up and I don't seem to be able to find a clear answer.
I'm asking this mainly since I was playing around with writing to files, and it seems like only one the outputs of the parent and child ends up in the file in the aforementioned situation. This seemed to imply that there are separate entries in the open file table for the two separate open calls, and hence separate offsets, so the slower process overwrites the output of the other process.
To illustrate this, consider the following code:
...ANSWER
Answered 2021-May-03 at 20:22There is a difference between a file and a file descriptor (FD).
All processes share the same files. They don't necessarily have access to the same files, and a file is not its name, either; two different processes which open the same name might not actually open the same file, for example if the first file were renamed or unlinked and a new file were associated with the name. But if they do open the same file, it's necessarily shared, and changes will be mutually visible.
But a file descriptor is not a file. It refers to a file (not a filename, see above), but it also contains other information, including a file position used for and updated by calls to read
and write
. (You can use "positioned" read and write, pread
and pwrite
, if you don't want to use the position in the FD.) File descriptors are shared between parent and child processes, and so the file position in the FD is also shared.
Another thing stored in the file descriptor (in the kernel, where user processes can't get at it) is the list of permitted actions (on Unix, read, write, and/or execute, and possibly others). Permissions are stored in the file directory, not in the file itself, and the requested permissions are copied into the file descriptor when the file is opened (if the permissions are available.) It's possible for a child process to have a different user or group than the parent, particularly if the parent is started with augmented permissions but drops them before spawning the child. A file descriptor for a file opened in this manner still has the same permissions uf it is shared with a child, even if the child would itself be able to open the file.
QUESTION
There are multiple development teams in an area of the organization that work closely together. Each has its own Azure DevOps board under the same Azure DevOps project. All boards inherit from the same Azure DevOps process.
One team would like to add a field to a work item type, but only show that field on their board. The field would not appear on the same work item type on the other teams' boards.
Is this possible? Microsoft has good documentation for Azure DevOps but I can't find anything that speaks to this, and I can't accomplish it myself in the UI. Thank you for any insights.
...ANSWER
Answered 2021-Jun-15 at 20:13If you add a new field to a work item type of some team project, this field will be available for all project teams.
Each team can customize the card view on each board (backlog or sprint): Add fields to cards, Customize fields
Additionally, you can use process rules to hide fields (Hide or restrict modification of a field based on a user or group) as Matt mentioned. You can find each team as a group [Team Project]\Team Name
in the conditions section.
QUESTION
I am trying to use my own train step in with Keras by creating a class that inherits from Model. It seems that the training works correctly but the evaluate function always returns 0 on the loss even if I send to it the train data, which have a big loss value during the training. I can't share my code but was able to reproduce using the example form the Keras api in https://keras.io/guides/customizing_what_happens_in_fit/ I changed the Dense layer to have 2 units instead of one, and made its activation to sigmoid.
The code:
...ANSWER
Answered 2021-Jun-12 at 17:27As you manually use the loss and metrics function in the train_step
(not in the .compile
) for the training set, you should also do the same for the validation set or by defining the test_step
in the custom model in order to get the loss score and metrics score. Add the following function to your custom model.
QUESTION
I am trying to work with Hilt injection in my project. I added the dependecies into my build.gradle file and then i created the the base application class, this class inherits from Applcication() and i annotated it with @HiltAndroidApp. After doing this i went ahead and rebuild the project for Hilt to generate the files but it give me this error.
...ANSWER
Answered 2021-Feb-16 at 13:11Upgrade your dagger-hilt dependencies to the same version.
Your project's root gradle file
classpath "com.google.dagger:hilt-android-gradle-plugin:2.31.2-alpha"
Your app level gradle file
implementation "com.google.dagger:hilt-android:2.31.2-alpha"
kapt "com.google.dagger:hilt-android-compiler:2.31.2-alpha"
QUESTION
I am trying to change the property of a CSS class on click on a button. Firstly i have this button in my html
...ANSWER
Answered 2021-Jun-15 at 12:07Here is a minimal JS fiddle example: HTML:
QUESTION
I am currently creating class diagrams in UML for a movie test domain. I would like to know if I am doing it right. Well, I have two alternatives (the first version in the first picture, the second in the second - I think the first one is better). I'm wondering if I've established the so-called "relationship owner" correctly, that is, from which class to which direction the relationships go. I also don't know if I didn't get multiplicity wrong (one to one, one to many etc.).
So on my domain I would like to have movies of course, the actors starring in those movies and directors. I wonder if the class name "Character" is good in this case, because I mean all the characters that take part in a movie - it can be director, actor but also for example "Batman". Maybe I should make a distinction here between "Movie Character" and then "Human", "Monster", whatever. But I don't know how to do it elegantly, will I then inherit from the Character class? I'm also wondering if I shouldn't put classes like City or Country together in one class called Address - but I wanted the classes to take attributes like in this case, that one is Master and the other is detail - and the relationship set in the right direction. I use only relations such as Inheritance and Dependency, I do not know if I should change something in this case.
Version 1
Version 2
Thanks in advance for any suggestions or advice!
...ANSWER
Answered 2021-Jun-15 at 11:58Use inheritance very carefully. Prefer association over inheritance whenever your inheritance is not a permanent truth from the birth to the death of an object. ANd keep in mind that dependencies between classes do not make any promises about objects of those classes.
Some more explanationsSome clarifications on the UML syntax:
- I understand that your plain thick lines ended with a small hollow triangle represent a specialization/generalization relationship (aka inheritance). If this is correct, the triangle should be larger to avoid visual confusion. Moreover multiplicity makes no sense with inheritance and should be removed.
- I understand that with the dotted line you intend to represent an association with multiplicity. If this is correct:
- the association should be plain lines, because dotted lines are for dependencies, and multiplicity would make no sense.
- the meaning you give to the arrow head would be unclear. Do you use them to document navigability? In case of doubt, remove them. If you want to document ownership of the association end, use the dot notation instead. (we cannot say if it’s right or wrong, since it’s a decision on how your model sees the associations)
In view of your comments and the third model linked therein, there are some key UML semantics you need to keep in mind:
- Inheritance is an ultra-strong relationship which means "is (always) a". In your example, you may say that an
Actor
is always aPerson
, and hence, everything you say about aPerson
is also true for anActor
. By the way, you should avoid repeating inherited properties or methods, since it could create some ambiguity. - Inheritance is not a substitute for aggregation, composition or association. You can for example not say that a
CrewMember
(one person) is always aCrew
(a group of persons). ACrewMember
belongs to aCrew
but there are things that the crew can do together that the individual member can't. - Inheritance is not suitable if it's not always true. A
Character
for example may often be aPerson
. But not always;: you can have ghost characters, comic characters, robot characters, or animals. - Association means that there is some structural relation between some instances of the associated classes. For example, that one ore several persons live in one city, seems a very relevant assocaition.
- Dependency means that a class is dependent on another, i.e. without the other class it would not work or something would be missing. It's a statement about the classes and not the objects. I.e. If you meant to say that
Person
is dependent onCity
you just say that the class Person would not work without knowing about City (for example, because the operationsendPostCardFrom(city: City)
needs an argument of that type) but you do not say anything about persons X, Y and Z. If you want that X, Y and Z are related to city a, b, and c, you need an association.
About the model content, I'll not decide for you and there is no single truth. I therefore prefer to draw your attention at potential issues. I raise them in form of a question, up-to you to adjust the model based on your own answer:
Common issues between the both variants:
- Are
Actor
andDirector
reallyPersons
? In this case, what with the Persons that are Actors and Directors at the same time (g.g. Clint Eastwood) ? Or areActor
andDirector
just roles that aPersons
takes for a givenMovie
? - Is a
Character
really related only to 1Movie
? What to do with Indiana Jones, where the same character appears in several movies? - In a similar way, I wonder if there's really a single
Person
who lives in aCity
or if this should not be a many-to-many association?
- Are
Issues regarding the differences: `
- Is a
Person
in version 1 aCharacter
(inheritance) ? Or is aCharacter
a representation of aPerson
(association: represents) ? - Is a
Character
in version 2 really anActor
and by transitivity also aPerson
(inheritance)? Or is theCharacter
only associated with anActor
(association: plays) ?
- Is a
It's up to you to decide, but wherever I asked a question about association or inheritance, you should better think twice before using inheritance (i.e. prefer association/composition over inheritance)
QUESTION
I am currently dynamically creating x number of divs and within each div, I have a button that shows a popup whenever clicked.
I am trying to position the button below the specific button that triggered it but the position of the popup is always static for a reason, it does not move below the button.
...ANSWER
Answered 2021-Jun-15 at 08:56You could add position: relative;
to the .popWrap
div. Then you can set position: absolute;
to the .popup
element and give it a specific (top) position to move it where you want it to be.
Example:
QUESTION
TL;DR: Interested in knowing if it's possible to use Abstract Base Classes as a mixin in the way I'd like to, or if my approach is fundamentally misguided.
I have a Flask project I've been working on. As part of my project, I've implemented a "RememberingDict" class. It's a simple subclass of dict, with a handful of extra features tacked on: it remembers its creation time, it knows how to pickle/save itself to a disk, and it knows how to open/unpickle itself from a disk:
...ANSWER
Answered 2021-Jun-15 at 03:43You can get around the problems of subclassing dict
by subclassing collections.UserDict
instead. As the docs say:
Class that simulates a dictionary. The instance’s contents are kept in a regular dictionary, which is accessible via the data attribute of UserDict instances. If initialdata is provided, data is initialized with its contents; note that a reference to initialdata will not be kept, allowing it be used for other purposes.
Essentially, it's a thin regular-class wrapper around a dict
. You should be able to use it with multiple inheritance as an abstract base class, as you do with AbstractRememberingDict
.
QUESTION
I cannot seem to see what is going wrong here, pretty basic usage to useContext and useState hooks. I have a darkModeContext where I am literally just flipping the boolean for darkMode, but whilst trying to flip it for the context I am getting setContext is not a function.
I took some code out from the navDrawer to make it easier to see but here is the error I am getting along with the code:
DarkThemeContext.js
...ANSWER
Answered 2021-Jun-14 at 19:51You have different keys in DarkThemeContext
and in NavDrawer
when you initialize the values, i.e. darkTheme
vs darkMode
.
Rename in NavDrawer
should resolve the error.
QUESTION
I have 5 different tables:
- Toasters: product name (foreign key to products and primary key), slots, serial
- Microwaves: product name (same as toaster), wattage
- Products: product name (primary key)
- Stock: product (fk to product), warehouse (fk to warehouse), amount
- Warehouse: name (primary key)
toasters and microwaves are child tables of products (although its not using postgres inheritance, since there are issues with it). They represent different models of toasters (simplified to just slots and wattage here). Every toaster and microwave has exactly 1 entry in the products table.
Now the goal is to create a query that essentially gives me an amount of all products across all warehouses for a given list of product names. The problem is, that some warehouses may not have a stock entry for a certain product. They also have either one stock per product or none.
I have managed to make it work for a single warehouse:
...ANSWER
Answered 2021-Jun-14 at 14:20Add a table of warehouses wanted.
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
Vulnerabilities
No vulnerabilities reported
Install inherit
Support
Reuse Trending Solutions
Find, review, and download reusable Libraries, Code Snippets, Cloud APIs from over 650 million Knowledge Items
Find more librariesStay Updated
Subscribe to our newsletter for trending solutions and developer bootcamps
Share this Page