kandi X-RAY | shave Summary
kandi X-RAY | shave Summary
Top functions reviewed by kandi - BETA
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Say I have a new table like such where there is no values yet:key uuid dog cat deer etc
and i have a populated table like such where it has values that i want to correlate to the new empty table:key uuid format status 1 uuid1 dog hairy 2 uuid1 cat fluffy 3 uuid2 dog shaved 4 uuid3 deer smooth
what i want to do is take each "format" from table 2 and create a new column in table 1 where "status" from table 2 is the value of the new "format" column in table one. Here is what i want the table to look like assuming the above tables are what im working with:key uuid dog cat deer etc 1 uuid1 hairy fluffy null other value 2 uuid2 shaved null null other value 3 uuid3 null null smooth other value
The extra tricky part is in table 2, uuid1 can have more or less "format" values than say uuid2 and visa versa continuing on to like 50k uuids so i need to fill the other columns with a null or falsey value
Is this possible or am I working with too ridiculous of data to make it happen?...
ANSWERAnswered 2022-Mar-22 at 20:01
Since you have created the new table this means that you already know the possible values of the column
In this case you can use conditional aggregation to populate the table:
I have a correlation matrix that includes bivariate correlations among 14 variables. How can I append asterisks to denote statistical significance? I am using the following code:...
ANSWERAnswered 2022-Mar-17 at 16:45
You could use a function that prints the statistical significance. Using the
colpair_map it will be easy to make a pretty matrix. I used the mtcars dataset as example. You can use the code below:
intptr_t is optional and
ptrdiff_t is mandatory, would
p - nullptr be a good substitute for
(intptr_t)p, to be converted back from a result denoted by
nullptr + n instead of
(decltype(p))n? It's IIUC semantically equivalent on implementations with
intptr_t defined, but also works as intended otherwise.
If I'm right in the above, why does the standard allow not implementing
intptr_t? It seems the liberty thus afforded isn't particularly valuable, just a set of two simple local source code transforms (or an optimized equivalent) to shave off.
ANSWERAnswered 2022-Feb-21 at 17:06
I have a script in Blender for plotting data points either in plane or spherical projection. However, the current method I have for converting my X,Y,Z coordinate for each vertex to spherical format is quite slow. Maybe some of you know of a more efficient method.
Essentially I have a (#verts,3) array of XYZ coordinates. Then I apply the following function over it....
ANSWERAnswered 2022-Feb-09 at 15:23
Not sure if that makes your code faster. Basically you apply the function not to each coordinate-vector, but individually for x, y and z (hopefully vectorized) and afterwards stack them together.
I currently use a template generator built in Classic ASP. It takes values in from a basic form and simply re-populates the template with those values, so the code can easily be copied and pasted on eBay, Amazon, etc. It also will generate the title for the listing.
The particular category of interest today is car wheels. Each wheel fits a certain span of years of the vehicle. Some wheels fit such a wide range of years that the title becomes stuffed with just years and doesn't leave any room for the rest. Here's an example:
Dodge Ram 1500 2002 2003 2004 2005 2006 2007 2008 2009 Used OEM Wheel
So to get around this, I wrote some code to shave off the beginning "20" of the year for each of the years between the first and last. So it would look like this:
Dodge Ram 1500 2002 03 04 05 06 07 08 2009 Used OEM Wheel
This shaves off enough extra characters so I can fit more useful information in the title before eBay cuts it off. However, now the problem. In the code, I am using a simple replace to shave off the first two digits of any 19XX years or 20XX years. In doing so, it also removes the year 2019 and 2020. Obviously the replace command is just doing its job, and I KNOW there is a better way with RegEx, however I am unfamiliar with the syntax completely. Here is the code I have:...
ANSWERAnswered 2022-Jan-19 at 16:52
You could try a function like this to format the years value instead of using
This is an an attempt to create a type of div I created in the past but with a custom stylesheet with minimal non-bootstrap css. It's not quite there yet, but I'm trying to covert each style rule I wrote into my django static files CSS into a bootstrap class. I'm stuck on viewport-based sizing.
The state prior to me discovering these docs is this, with the height fitting content as you would expect:
I set my class to "vh-100" which very cool, sets the div to take up the full vertical height of the view port.
But wait, it matches the height the ENTIRE viewport, not the remainder after the navbar and padding is figured out. Makes sense though.
Awesome! just need to shave a little off that so it actually fits in the actual viewport and we have the desired end state.
Looking in bootstrap documentation you can usually specify 25%, 50%,75%, or 100% like we did here. Well, it doesn't talk about that for viewport-based sizing, but it does in a lot of bootstrap stuff, so I'd guess it'd be the same here. So I give that a go. 75% Viewport should be just right to give it a little bottom area.
So now "vh-50" or "vh-75"
Okay, weird- Viewport must be 100 or it falls back to sizing based on content. No other examples of any other values for viewport based sizing are visible in docs, and I couldn't locate any in the wild.
Just in case, here's the html for that div (part of a jinja content block in a django app)...
ANSWERAnswered 2021-Nov-16 at 20:55
You shouldn't be setting heights manually. You should be using the flexbox grid to do it automatically with the appropriate alignment classes.
- Put a flex column around the navbar and content elements with class
vh-100. This can simply be the body element.
- Put class
flex-fillon the content element so it stretches to fill the remaining space.
i have a JSON dict list that i want to extract a value from based on another value in the same dict. I have tried multiple ways of getting the value but i can not find anything that works. the dict list can have variable number of dicts, and therefore it doesn't always give the correct answer when use numbered brackets. (['objectEntries']['attributes']["subValue"]['displayValue'])
The objectEntries dict list contain more dicts, but I shaved it for size. I will loop through all the dicts to extract the same value.
i have a json:...
ANSWERAnswered 2021-Nov-10 at 16:18
Maybe you could just check for the key instead of guessing the correct dictionary to manipulate?
I am trying to build my very own first project that is relatively large, at least for my level of experience anyway. I am heavily relying on useContext in combination with useStates hooks to handle the logic between my different components, as time goes, it's really starting to get difficult to keep track of all these different states changes and simple onClick events I have to change the logic of a large number of states.
Hoping for a little bit of personal advice that could steer me in the right direction. as somehow what I do, doesn't feel normal, or this is the reality of React? Surely there are more clever ways to reduce the amount of state logic management?
Here are a few snippets of code I am using...
ANSWERAnswered 2021-Nov-04 at 22:10
I have working on big project too, and as you say in your question, Reducer will help you to fix your issue, but surly you need to be careful how you will build and manage your state, so the idea how you manage a state, so before I put my answer, I will write some important note:
- Make sure to reduce nested context as you can, only build context and use context when theres a needed for that, this will optomize your work
- For handling or merge state, you can use object, arrays and normal variable, but keep in your mind, try to prevent nested level of objects, to keep state update on state change.
- Use reducer to handling update on state will give you a nice ability
- We can do some tricks to improve performance like set condition in reducer which its check old state and new state.
Keep in your mind, really its easy to use it, but the first time its hard to learn...
Now lets start from a real project example:
I have a tibble that includes a list-column with vectors inside. I want to create a new column that accounts for the length of each vector. Since this dataset is large (3M rows), I thought to shave off some processing time using the
furrr package. However, it seems that
purrr is faster than
furrr. How come?
To demonstrate the problem, I first simulate some data. Don't bother to understand the code in the simulation part as it's irrelevant to the question.
data simulation function...
ANSWERAnswered 2021-Nov-02 at 22:59
As I have argued in the comments to the original post, my suspicion is that there is an overhead caused by the distribution the very large dataset by the workers.
To substantiate my suspicion, I have used the same code used by the OP with a single modification: I have added a delay of
0.000001 and the results were:
purrr --> 192.45 sec and
furrr: 44.707 sec (
8 workers). The time taken by
furrr was only 1/4 of the one taken by
purrr -- very far from 1/8!
My code is below, as requested by the OP:
I am doing exercises from leetcode as a way to learn Rust. One exercise involves finding the longest substring without any character repetition inside a string.
My first idea involved storing substrings in a string and searching the string to see if the character was already in it:...
ANSWERAnswered 2021-Oct-12 at 05:44
When it comes to performance, one test is always better then 10 reasons.
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