sclient | Secure Client for exposing TLS | TLS library
kandi X-RAY | sclient Summary
kandi X-RAY | sclient Summary
Secure Client for exposing TLS (aka SSL) secured services as plain-text connections locally. Also ideal for multiplexing a single port with multiple protocols using SNI.
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QUESTION
I'm reading someone else's code and I don't understand what is the use of @z
here:
ANSWER
Answered 2022-Feb-19 at 22:40@
refers to the matrix multiplication operator.
From the numpy
docs:
The @ operator can be used as a shorthand for np.matmul on ndarrays.
QUESTION
There are so many ways to define colour scales within ggplot2
. After just loading ggplot2
I count 22
functions beginging with scale_color_*
(or scale_colour_*
) and same number beginging with scale_fill_*
. Is it possible to briefly name the purpose of the functions below? Particularly I struggle with the differences of some of the functions and when to use them.
- scale_*_binned()
- scale_*_brewer()
- scale_*_continuous()
- scale_*_date()
- scale_*_datetime()
- scale_*_discrete()
- scale_*_distiller()
- scale_*_fermenter()
- scale_*_gradient()
- scale_*_gradient2()
- scale_*_gradientn()
- scale_*_grey()
- scale_*_hue()
- scale_*_identity()
- scale_*_manual()
- scale_*_ordinal()
- scale_*_steps()
- scale_*_steps2()
- scale_*_stepsn()
- scale_*_viridis_b()
- scale_*_viridis_c()
- scale_*_viridis_d()
What I tried
I've tried to make some research on the web but the more I read the more I get onfused. To drop some random example: "The default scale for continuous fill scales is scale_fill_continuous()
which in turn defaults to scale_fill_gradient()
". I do not get what the difference of both functions is. Again, this is just an example. Same is true for scale_color_binned()
and scale_color_discrete()
where I can not name the difference. And in case of scale_color_date()
and scale_color_datetime()
the destription says "scale_*_gradient
creates a two colour gradient (low-high), scale_*_gradient2
creates a diverging colour gradient (low-mid-high), scale_*_gradientn
creates a n-colour gradient." which is nice to know but how is this related to scale_color_date()
and scale_color_datetime()
? Looking for those functions on the web does not give me very informative sources either. Reading on this topic gets also chaotic because there are tons of color palettes in different packages which are sequential/ diverging/ qualitative plus one can set same color in different ways, i.e. by color name, rgb, number, hex code or palette name. In part this is not directly related to the question about the 2*22
functions but in some cases it is because providing a "wrong" palette results in an error (e.g. the error"Continuous value supplied to discrete scale
).
Why I ask this
I need to do many plots for my work and I am supposed to provide some function that returns all kind of plots. The plots are supposed to have similiar layout so that they fit well together. One aspect I need to consider here is that the colour scales of the plots go well together. See here for example, where so many different kind of plots have same colour scale. I was hoping I could use some general function which provides a colour palette to any data, regardless of whether the data is continuous or categorical, whether it is a fill or col easthetic. But since this is not how colour scales are defined in ggplot2
I need to understand what all those functions are good for.
ANSWER
Answered 2022-Feb-01 at 18:14This is a good question... and I would have hoped there would be a practical guide somewhere. One could question if SO would be a good place to ask this question, but regardless, here's my attempt to summarize the various scale_color_*()
and scale_fill_*()
functions built into ggplot2
. Here, we'll describe the range of functions using scale_color_*()
; however, the same general rules will apply for scale_fill_*()
functions.
There are 22 functions in all, but happily we can group them intelligently based on practical usage scenarios. There are three key criteria that can be used to define practically how to use each of the scale_color_*()
functions:
Nature of the mapping data. Is the data mapped to the color aesthetic discrete or continuous? CONTINUOUS data is something that can be explained via real numbers: time, temperature, lengths - these are all continuous because even if your observations are
1
and2
, there can exist something that would have a theoretical value of1.5
. DISCRETE data is just the opposite: you cannot express this data via real numbers. Take, for example, if your observations were:"Model A"
and"Model B"
. There is no obvious way to express something in-between those two. As such, you can only represent these as single colors or numbers.The Colorspace. The color palette used to draw onto the plot. By default,
ggplot2
uses (I believe) a color palette based on evenly-spaced hue values. There are other functions built into the library that use either Brewer palettes or Viridis colorspaces.The level of Specification. Generally, once you have defined if the scale function is continuous and in what colorspace, you have variation on the level of control or specification the user will need or can specify. A good example of this is the functions:
*_continuous()
,*_gradient()
,*_gradient2()
, and*_gradientn()
.
We can start off with continuous scales. These functions are all used when applied to observations that are continuous variables (see above). The functions here can further be defined if they are either binned or not binned. "Binning" is just a way of grouping ranges of a continuous variable to all be assigned to a particular color. You'll notice the effect of "binning" is to change the legend keys from a "colorbar" to a "steps" legend.
The continuous example (colorbar legend):
QUESTION
I have a question about C# communication.
Currently using .Net and studying Socket. You can create a socket server using the internal IP and connect as an internal client. Is it possible to open a server in another network like a chat program and connect to Socket Ip:Port from another network?
...ANSWER
Answered 2022-Jan-25 at 09:38Yes of course. I draw a little image for a normal connection over the internet.
What you have to do?- Open a port in your router (aka enable port-forward) and forward
60800
to192.168.0.20:8000
. - Determine your external ip. Google for "what is my ip" or go to my site.
- Connect the via
your-external-ip:60800
.
Hint: 60800
can be any other random port-value. I suggest high random numbers, so that hacker/scanner can't discover your service so fast.
That is very basic. I recommend, that you start learn how the ip-communication is working.
QUESTION
I'm sorry for this very basic question, but I can't find it out. Basically I'm trying to read this file line-by-line, then in another HTML page whenever there is a string that match one of these lines, then it will be wrapped within the ...
tag. For the latter I can use the findAndReplaceDOMText library, and I thought that the former should be easy too. But I can only find answers to read an uploaded file. That is, using
ANSWER
Answered 2022-Jan-08 at 16:34You can use the Fetch API and read the response as text and iterate line by line
QUESTION
I am trying to debug some Java 11 test code which uses an SSLServerSocket for the server and an SSLSocket for the reply. The basic code works as follows:
...ANSWER
Answered 2021-Nov-25 at 16:31After quite a few days of researching and delving deep into OpenJDK 11, I realized that my test case that was expecting the "Empty server certificate chain" was incorrect.
In Java 11, the TLS or SSL protocol supports TLSv1.2 and TLSv1.3. The test case was deciding what the expected message was based essentially on this pseudocode:
QUESTION
I used this code for crawl question and anwser of Google People Also Ask. I want use that for create idea for writer.
But I can't get exactly that element, in this time I was try with full Xpath, but with some keyword it will change Full Xpath and it will have error.
Variable order is quality of question and number I need crawl.
...ANSWER
Answered 2021-Nov-21 at 09:28You should first construct an xpath
QUESTION
I can't find any references to this anywhere, in fact Google seems to be willfully ignoring my use of quotes to force its inclusion -- "
ANSWER
Answered 2021-Oct-13 at 16:53To make the comment an answer:
It means there's a
You can use e.g. document.querySelectorAll("style")
to enumerate those.
QUESTION
I have the following piece of code:
...ANSWER
Answered 2021-Aug-26 at 15:34Kotlin doesn't support multiple return types. The idiomatic way to do this is to declare a class
or a data class
(I'm just making up a name, change to suit):
QUESTION
I am using Python 3.9.6 x64 on Windows 10, and I want to know how can I share variables between sub-processes.
Why? Because I am writing a asynchronous multi-connection resumable downloader using requests, and by default requests enables keep-alive
, this leaves a hanging connection of dead requests and often causes server to send extra bytes from previous dead connections upon resuming, I have tried r.close()
, r.connection.close()
, s.close()
and s.headers['connection'] = 'close'
, all of them have failed to solve the problem while using threading.Thread
.
However I have never ever encountered a scenario where extra bytes from previous process were received, and all downloads without pausing were successful (that is, if the connection didn't die mid-download, which happens rather often), so I think the connections are guaranteed to be killed if the corresponding processes are killed, so I am looking for a solution using multiprocessing.Process
(I know downloading is I/O bound not CPU bound etc., however threads don't receive new pids), but I don't know how to share variables between processes...
Specifically I want to share two objects:
1, a mmap
object that stores the downloaded data.
2, a dictionary created using this:
...ANSWER
Answered 2021-Aug-20 at 09:17I've replaced my environment as best as I can (Windows, Python v3.9.6) but unable to reproduce your error. The multiprocessing code works fine & able to share the objects between processes using multiprocessing.Manager
and also multiprocessing.Value
.
This issue usually happens because - only top-level functions/statements can be pickled.
I suggest you to try pathos.multiprocessing
, a fork of multiprocessing that uses dill instead of pickle. dill
can serialize almost anything in python.
QUESTION
I want to download first 10 images from the given Url stated in the following code of google images. I have tried soo much ways but not able to download images because i got the wrong lengthy urls which seems to be junk data.
Here is my code as i am using C#,
...ANSWER
Answered 2021-Jul-01 at 22:41src
attribute of img
tag is not always URL to image, image content itself may be placed in src
attribute. for example consider following example when jpg image is stored directly in src:
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