Precalc | repo contains some code which can graph equations
kandi X-RAY | Precalc Summary
kandi X-RAY | Precalc Summary
The initializer of the GraphView sets up how the graph should be drawn, mimicing how you might do it in real life:. The "smaller x bound" is the negative x value on the left edge, and the "larger" one is the positive x value off to the right. Graphs are always square, and scale to fit inside the frame of the GraphView. (The frame is currently hard coded to some value I liked during testing. There's a TODO to make this customizable.). If you make the bounds farther apart from each other, the graph will have smaller boxes, more points, and take longer to draw. If you make the X values closer to each other, you get... bigger boxes, fewer points, and maybe a quicker draw. The interval is how often along the X axis we want equations to calculate a Y value. Think of this as how many points we want to draw on each square on our graph paper.
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QUESTION
Well, the thing is simple, im getting
warning: ‘void* memset(void*, int, size_t)’ clearing an object of non-trivial type ‘struct FormatHashBuffers(CBlock*, char*, char*, char*)::’; use assignment or value-initialization instead [-Wclass-memaccess] memset(&tmp, 0, sizeof(tmp));
on this function and idk why, when i build with g++ 5 no warning, but when i build with 7.1 or 8.5 i get the warning, any idea why or how to solve it? Thanks in advance.
ANSWER
Answered 2021-Feb-25 at 12:23any idea why
Obviously, the -Werror flag was not set properly for your g++ v5 environment or it was not considered by the developers at that time. It should always produce this warning.
how to solve it?
Simply not refer to memset here! Since possible performance issues can be neglected here due to the presence of SHA256Transform() at least in contrast, you should prefer a clean explicit initialization here instead. Try to avoid the nested struct (since the inner is already been used within a more "global" scope anyways further on) and refer to aggregate/uniform initialization or an explicit factory way.
QUESTION
I have a struct
with some other struct
s as member. Both external and internal structs are StandardLayout
(it can be even assumed that internal are plain old data). Something like this:
ANSWER
Answered 2020-May-05 at 18:58I do think this is safe (as in not a violation of strict aliasing).
However, the language does have a better mecanism for doing this: Pointers to data members, which compile down to basically an offset.
The caveat is that you'll have to make separate overloads for Inner1
and Inner2
QUESTION
I am trying to update a status filed in a SharePoint list. Did some googling, found most of the examples are using an ID column to locate the list item, but my list doesn't have such column, only a windows login and a status columns. I am wondering what the XML would be like?
This is what I come up with, but it doesn't work:
...ANSWER
Answered 2019-Jun-25 at 22:04I believe all list items in SharePoint get an auto generated ID. I'd use the list view or pull the list items to see if an id exists.
QUESTION
Note on duplicate message:
Similar themes, not exactly a duplicate. Esp. since the loop is still the fastest method. Thanks.
Goal:
Upscale an array from [small,small] to [big,big] by a factor quickly, don't use an image library. Very simple scaling, one small value will become several big values, after it is normalized for the several big values it becomes. In other words, this is "flux conserving" from an astronomical wording - a value of 16 from the small array spread into a big array's 4 values (factor of 2) would be 4 4's so the amount of the value has been retained.
Problem:
I've got some working codes to do the upscaling, but they don't work very fast compared to downscaling. Upscaling is actually easier than downscaling (which requires many sums, in this basic case) - upscaling just requires already-known data to be put in big chunks of a preallocated array.
For a working example, a [2,2] array of [16,24;8,16]:
16 , 24
8 , 16
Multiplied by a factor of 2 for a [4,4] array would have the values:
4 , 4 , 6 , 6
4 , 4 , 6 , 6
2 , 2 , 4 , 4
2 , 2 , 4 , 4
The fastest implementation is a for loop accelerated by numba's jit & prange. I'd like to better leverage Numpy's pre-compiled functions to get this job done. I'll also entertain Scipy stuff - but not its resizing functions.
It seems like a perfect problem for strong matrix manipulation functions, but I just haven't managed to make it happen quickly.
Additionally, the single-line numpy call is way funky, so don't be surprized. But it's what it took to get it to align correctly.
Code examples:
Check more optimized calls below Be warned, the case I have here makes a 20480x20480 float64 array that can take up a fair bit of memory - but can show off if a method is too memory intensive (as matrices can be).
Environment: Python 3, Windows, i5-4960K @ 4.5 GHz. Time to run for loop code is ~18.9 sec, time to run numpy code is ~52.5 sec on the shown examples.
% MAIN: To run these
...ANSWER
Answered 2018-Nov-16 at 05:58I did some benchmarks about this using a 512x512
byte image (10x upscale):
QUESTION
trying to pass list items(PreCalc) into a simple function. trying to covert the list into a tuple version (calc) and then call the function.
Get the error message: TypeError: 'tuple' object is not callable
How can I pass my inputs() into the function?
...ANSWER
Answered 2018-Feb-23 at 22:56You don't need to convert your list into a tuple
QUESTION
I try to implement a multiple “if - else” statements in a JQuery code. It is about calculating an exam marks and divide the results into groups. There is obviously a mistake in the second function (the first one alone works just fine), but I could find it :( maybe I use wrong the “if - else” function.
Thank you for the help in advance.
HTML
...ANSWER
Answered 2017-Oct-27 at 19:40It looks like you had several small syntax errors throughout the javascript code. I cannot really name them all, but here is the code without errors:
I formatted the javascript with indenting as well, which help a great deal in avoiding small syntax errors like these ones. The code seems to work now just by playing with the snippet html form.
Run the snippet below:
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