hostile | Simple , programmatic ` /etc/hosts ` manipulation | Runtime Evironment library
kandi X-RAY | hostile Summary
kandi X-RAY | hostile Summary
Simple, programmatic `/etc/hosts` manipulation (in node.js)
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Trending Discussions on hostile
QUESTION
I have a problem with seeding data into an EF Core DB. The data consists of movies that have a Person
object as a relation for their director. The relation works on the basis that a movie should have one director and each director entity in the DB has one directed movie (not ideal but besides the point). The problem arises when I try to seed the initial data in the DB. Since I'm seeding both the movies and the directors, I can't know the IDs of the entities beforehand and I need to be able to search the context for a director with a given name before creating a movie that has a relation to it.
For example:
This is the seeding of the people (directors)
...ANSWER
Answered 2021-May-30 at 16:36I generally don't recommend creating new GUID every time. This code will generate a different ID when deployed to different environments i.e staging and production, so you will only be left to query objects by name which creating ID column seems useless.Also you need to define primary key for each entity. So it will be better if you hardcode your GUID's like
QUESTION
I am adding sections to our website and all but one of them are working the way I want: i.e. no margin between sections.
I'm not able to get this one page's sections to have no margin between sections; they have extra space beneath. I have went over the code with a fine tooth comb and cannot find the error.
I am first including the code of a sample page that works correctly:
...ANSWER
Answered 2021-May-20 at 17:39What you are experiencing is called "collapsing margins". Example: If there's an h2
as the first child element inside a div, and the div has no margins, the top margin of the h2
will "go outside the div" at the top - h1, h2 etc. tags have a default margins in practically all browsers (which is a browser setting). To prevent that, you can define all margins for according elements as zero, like I did below with
QUESTION
I have a large table with a comments column (contains large strings of text) and a date column on which the comment was posted. I created a separate vector of keywords (we'll call this key) and I want to count how many matches there are for each day. This gets me close, however it counts matches across the entire dataset, where I need it broken down by each day. The code:
...ANSWER
Answered 2021-Apr-21 at 18:50As pointed out in the comments, you can use group_by
from dplyr
to accomplish this.
First, you can extract keywords for each comment/sentence. Then unnest
so each keyword is in a separate row with a date.
Then, use group_by
with both date and comment included (to get frequency for combination of date and keyword together). The use of summarise
with n()
will give number of mentions.
Here's a complete example:
QUESTION
I have an HTML string where I'm trying to generate an array of all substring instances that occur between two sets of characters.
My string looks something like this:
...ANSWER
Answered 2021-Apr-18 at 10:24As mentioned in the comment using an XMLParser
here would be a good idea.
Define your XMLParser
, and set its delegate (XMLParserDelegate
) which is a class you define (inheriting from XMLParserDelegate
!). there you need two functions:
QUESTION
I'm trying to proxy a set of object such that I can pass them off to third party code and temporarily nullify mutation methods and setters, and then revoke the proxy handler traps to reinstate normal behaviour. What I've discovered is that proxies are inherently hostile to this
-dependent code.
I'm intrigued as to how & why Javascript Proxies break this
binding for their proxied targets. In the following example I have a simple class which ingests a value on construction, stores it as a private field, and returns it on property access. Observe that:
- Attempting to access the property through a proxy without a handler throws an error
- Explicitly forwarding a handler
get
trap throughReflect.get
reinstates normal behaviour
ANSWER
Answered 2021-Feb-25 at 17:50TDLR;
- Private access requires the context of operation to be set to the object that created the private member (Proxy solution provided)
- For the use case and contrived code you supplied, a Proxy is not required as simple inheritance can be used to accomplish the goal (solution at very bottom)
The no-op Proxy in the first example is not broken. The get()
method is still invoked via the Proxy object (even no-op) and not the thing
object. So the private member is not accessible via the proxy with proxy1.value
. Your fix in the first example, using reflection, is the common way of accessing those members in almost every language with access restrictions (some require inflection). Historically, before Reflect.get()
was available, this was done using the function object's .apply()
method. So the use of Reflect.get()
makes sense for the very same reason.
Bottom Line:
So you must take some action to set the context to the object that created the private member, otherwise you will not gain access to it.
Second ExampleThe call to Reflect.get()
doesn't work in the second example because of shifting getter syntax from get value()
to value()
. Now that a function is called to retrieve value
it must be bound to the correct object. Simple reflection is not sufficient. To make Reflect.get()
work here you must bind the getter function to the target.
Using function's .bind()
method is the other traditional way of controlling the context of operation. From the docs:
The bind() method creates a new function that, when called, has its
this
keyword set to the provided value...
Reflect.get(target, key).bind(target)
Which is exactly the same as your use of .bind()
in this:
target[key].bind(target)
The static Reflect.get() method works like getting a property from an object (target[propertyKey]) as a function.
Bottom Line
In both cases (Reflect.get()
, .bind()
), the context is shifted to the object that created the private member. This is necessary in many use cases and is not isolated to Proxy.
QUESTION
I'm wondering how to stop an unresponsive thread in Java, such that it's really dead.
First of all, I'm well aware of Thread.stop()
being deprecated and why it should not be used; there are already many excellent answers on this topic, cf. [1][2]. So, the question more precisely is, whether it's actually technically possibly to kill a thread which code is not controlled by us but possibly hostile and not responding to interrupts.
In the simplest case, a hostile thread would be running while(true);
, but it could as well be using up memory or other system resources to do more damage. Calling interrupt()
on that thread is obviously ineffective. What about calling stop()
instead?
I have run this in a debugger and, in fact, the thread really disappears. But is this approach reliable? The hostile thread could be prepared for this case; think of try{run();}catch(ThreadDeath t){run();}
where it catches the ThreadDeath
that is produced when we call stop()
and recursively calls itself again.
As an outside observer, we cannot see what is going on; Thread.stop()
always runs silently. Worst of all, the usual diagnostics won't work anymore (tried this while debugging on Corretto 1.8.0_275 Windows x64): Thread.getState()
always returns RUNNABLE
regardless of success in killing the thread, same goes for Thread.isAlive()
(always true).
ANSWER
Answered 2020-Dec-30 at 07:58It may not be possible, at least not reliably in every scenario.
IF I understand the mechanism correctly (and there is some uncertainty there), if the code executes in such a way that there are no safepoints during the execution (for example in counted loops), it is not possible for the JVM to signal to the thread that it should stop (the thread never polls for an interrupt).
In such a scenario, you need to kill the JVM process, rather than the thread.
Some extra reading:
QUESTION
I am trying to implement some preprocessing command for json dataset. Its was easy to work with .csv file, but I am not able to get how to implement some preprocessing command like isnull(), fillna(), dropna() and imputer class.
Below are some of the commands that I have executed but failed to perform above mentioned operation as I am not able to figure out how to work with Json file dataset.
dataset link : https://drive.google.com/file/d/1puNNrRaV-Jt_kt709fuYGCvDW9-EuwoB/view?usp=sharing
...ANSWER
Answered 2021-Jan-24 at 00:14One of your challenges with this dataset is the fact that it has different keys names for the same data, for example, 'Tomato Score'
and 'tomatoscore'
. The solution below is not the best and it could be optimized a lot, but, I put it in this way so it can be easier for you to see the steps implemented to make the data consistent:
QUESTION
Problem
Just for clarification: this is not really about sorting in its precise sense. I am given a function (sort-sym lst symbol)
. The function takes in a (listof (listof symbol)) and a symbol to turn it into a (list (listof (listof symbol)) (list (listof symbol))). Just stating the problem here does not really help that much so let's jump right in to the examples.
Examples
For a list
...ANSWER
Answered 2020-Nov-12 at 12:48As hinted in the comments, in Racket it will be a simple matter of using the partition
built-in procedure:
QUESTION
thank you in advance for taking the time to read. I've been with a project on Android using Java for weeks. But I have had this problem for days, I tried many things but nothing worked.
What happens is that the "main" button (black color) that expands the other buttons is; scrolls. Before and after expanding the other buttons.
Ideally, it should stay fixed in place before and after pressing. And that the other white buttons do scroll below the black button.
I attach the complete XML and screenshots.
We open the application and it will look like this:
[][1]
https://i.stack.imgur.com/ExwgJ.png
Then we scroll and ideally nothing happens, but the main button is hidden behind the text box.
[][2] [][3]
https://i.stack.imgur.com/VZqAA.png
https://i.stack.imgur.com/7gszP.png
We press the main button and as it should be, the other buttons expand.
[][4]
https://i.stack.imgur.com/r6km3.png
But we scroll and the buttons instead of getting under the black button, they scrooll all the buttons including the black one.
[][5]
https://i.stack.imgur.com/3RDnO.png
Here is the XML code:
...ANSWER
Answered 2020-Nov-07 at 10:47Try this
QUESTION
I have a question. I am trying to understand First Order Logic, so I found this code:
...ANSWER
Answered 2020-Nov-02 at 14:25As far as I can see, you first create a list of clauses in the clause
array. This you then use to initialise the knowledge base KB
.
With the tell()
method, you can add further expressions/clauses to the knowledge base.
In principle they are equivalent, in that both ways of doing this result in clauses being added to the knowledge base, only some at initialisation, others afterwards.
You might have a particular setting/domain which is fixed, and different expressions for different problems, so you can put all the common expressions in at the beginning, and add others later during processing.
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