zz | πΊπ ZetZ a zymbolic verifier and tranzpiler to bare metal C
kandi X-RAY | zz Summary
kandi X-RAY | zz Summary
ZetZ is for systems without dynamic memory, where C is and will remain the defacto standard system interface. Target bare metal MCUs, embedded linux, WASM, and embed it in other languages. You can also use it to build cross platform libraries, with a clean portable C-standard api. Zetz plays nice with others and does not require rewriting everything in zetz to be useful in large projects. A major innovative feature is that all code is formally verified by symbolic execution in a virtual machine, at compile time.
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QUESTION
Good Morning,
I'm trying to formulate something in Excel that allow us to check if the value of two columns are new in a list, and if so, assign a new ID for them. If it's not, let it "Blank" or Assign the same ID that have been assigned before(Either way would work for me).
I'm trying to use something with Count.if, but it doesn't fit. As i'm thinking about this for some time, i decided to look for help.
What i want to do is a formula that solves the "Formula" Columns below:
...ANSWER
Answered 2022-Mar-29 at 16:03If you don't mind non-sequential numbering, you can just return the index of the first match found as your identifier:
Copy into C2, then fill down as necessary. The match row stop may need alteration based on how much data you have
QUESTION
There are variables V, A, X and O
with two values i.e., i
and j
in the form of 0s and 1s.
At first, I used the i
value for each variable
ANSWER
Answered 2022-Mar-09 at 10:55IIUC use:
QUESTION
I found this great question with some concise code that, with a couple of tweaks, fits a 3D polynomial surface onto a set of points of in space.
Python 3D polynomial surface fit, order dependent
My version is below.
Ultimately, I've realized that I need to fit a surface over time, i.e. I need to solve for a 4 dimensional surface, and I've struggled with it.
I came up with a very hacky and computationally intensive work-around. I create a surface for each time interval. Then I create a grid of points and find the Z value for each point on each surface. So now I have a bunch of x,y points and each one has a list of z values that need to flow smoothly from one interval to the next. So we do a regression on the z values. Now that the z-flow is smooth, I refit a surface for each time interval based on the x,y points and whatever their smoothed Z value is for the relevant time interval.
Its what it sounds like. Clunky and suboptimal. The resulting surfaces flow more smoothly and still perform okay but there's gotta be a way to cut out the middle man and solve for that 4th dimension directly in the fitSurface function.
...ANSWER
Answered 2022-Feb-22 at 00:46Alright so I think I got this dialed in. I wont go over the how, other than to say that once you study the code enough the black magic doesn't go away but patterns do emerge. I just extended those patterns and it looks like it works.
Admittedly this is so low res that it look like its not changing from C=1 to C=2 but it is. Load it up and you'll see. The gif should show the flow more cleary now.
First the methodology behind the proof. I found a funky surface equation and added a third input variable C (in-effect creating a 4D surface), then studied the surface shape with fixed C values using the original 3D fitter/renderer as a point of trusted reference.
When C is 1, you get a half pipe from hell. A slightly lopsided downsloping halfpipe.
Whence C is 2, you get much the same but the lopsidedness is even more exaggerated.
When C is 3, you get a very different shape. Like the exaggerated half pipe from above was cut in half, reversed, and glued back together.
When you run the below code, you get a 3D render with a slider that allows you to flow through the C values from 1 to 3. The values at 1, 2, and 3 look like solid matches to the references. I also added a randomizer to the data to see how it would perform at approximating a surface from imperfect noisy data and I like what I see there too.
Props to the below questions for their code and ideas.
Python 3D polynomial surface fit, order dependent
python visualize 4d data with surface plot and slider for 4th variable
QUESTION
I have a command that has an output of the sample below.
...ANSWER
Answered 2022-Feb-14 at 15:551st solution: With your shown samples, with any awk
, please try following. Simple explanation would be, using match
function matching regex "[^"]*"
to match from 1st occurrence of "
to next occurrence of "
and printing matched sub-string and next
will skip all further statements. In case this condition is NOT TRUE then anyways usual way of printing 2nd field will work so printing $2 then.
QUESTION
I have a data frame df
with 5 columns. Region.Label
indicates the Region where the study was performed, Sample.Label
is a specific area within that Region where I counted for birds, Sp
is the bird species I found in that specific area, Distance
is the distance between the bird and me, and Effort
is the time I was in the area looking for birds. When Distance
is NA
means that for this area the species was not observed. As an example of the data frame I have:
ANSWER
Answered 2022-Jan-18 at 18:41Perhaps, a group by operation would help - grouped by 'Region.Label', 'Sample.Label', 'Effort', filter
the non-NA elements of 'Distance' if there are any non-NA elements or else get the first row (row_number() == 1
)
QUESTION
I have written an external DSL with SWI-Prolog that works by parsing text with a DCG, transforms parsed expressions into facts that get assert
ed into the Prolog process, then exposes a query language to the user using the same DCG grammar to query against the facts.
I am stuck trying to figure out how to translate a ground term resulting from a DCG-based parser into a non-ground term with variables that can be passed into a functor like findall/3
to return a list of query results for the user.
Here is an example of a dataset that could be queried:
...ANSWER
Answered 2022-Jan-16 at 23:17Singleton variables are one way to go here. Your solution is actually fine and gives no warning if you mark the singleton variable as such with an underscore:
QUESTION
A dll can be invoked in Powershell; it takes several parameters, and I must run it several times while most of them stay the same, like this:
...ANSWER
Answered 2022-Jan-08 at 11:31Too long for a comment, and I have no idea if this would work, but perhaps you can use a small helper function to convert the common arguments from the splatting Hashtable into commandline syntax like
QUESTION
I use the following code:
...ANSWER
Answered 2021-Nov-24 at 01:29This is caused by the DAG generated by Spark. Some operators (or transformers
) is are lazy-executed, so they pave the way for Spark to optimize the DAG.
In this example, there are two major steps: select
(or project
in SQL's jargonοΌ first, and filter
later. But in fact, when executing, filter
first, and then select
, because it is more efficient.
You can verify this conclusion by explain()
method:
QUESTION
Today I updated my Android Studio to the newest stable version (Arctic Fox 2020.3.1)
and whenever I try to open xml layout, it crashes. I've tried many different things, from rebuilding to invalidating but nothing helped. After upgrade I haven't been able to uninstall Android, because uninstaller was missing (possibly due to crash). I had to restore the system to the point I had an older version. At this point I managed to reinstall Android Studio to the newest version. Even after that the program persisted to crash after trying to open xml (crashes while initializing). At this point I couldn't uninstall again, because the uninstaller is missing (I believe it's due to crash). I had to restore the system again. Any ideas what should I do or did anyone else had the same issue sometimes ago? Thank you in advance. A portion of error is listed below:
ANSWER
Answered 2021-Aug-13 at 15:57For Windows
Replace the existing libandroid_runtime.dll
at
QUESTION
I am working on a project and i added an onlclick function in 3 elements in my code but none of them works because that element is not a button or an anchor tag i guess but i have to do something when that area is clicked here is the image:- This is the image
I want to either click on the white part of the circle or the the colourfull part of the circle , right now i am trying to click on the colorfull part but i get nothing but when i put an anchor tag in one of the heading and then use onclick on it then it works but in the circle there is no text on which i can add anchor tag i also tried to use change the div to button type of class items and it became clickable but the java script still not works . Here is the code :- 'HTML'
...ANSWER
Answered 2021-Nov-12 at 07:02When calling a function in onclick, you must specify that it is a function.
Use ()
at the end.
Example:
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