gf | A wrapper around grep , to help you grep for things | Regex library
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kandi X-RAY | gf Summary
A wrapper around grep to avoid typing common patterns.
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QUESTION
The objective is calculate subset column average based on the multi condition in a multiindex dataframe.
The first condition is to get the average group by the first level of the multiindex.
The second condition is to get the average based on the dict_ref
value below
ANSWER
Answered 2022-Apr-16 at 12:16You can flip dict_ref
so each item in the value array becomes the key, perform a replacement, and group by the new ch
:
QUESTION
The result I get now gives me blank when that character is not there:
Code
...ANSWER
Answered 2022-Feb-26 at 13:59As a quick fix you can try this:
QUESTION
I'm trying to generate the sentence It's sunny on Monday and rainy on Tuesday
on GF using RGL. I looked for a method to generate this sentence on the RGL page, but I couldn't find anything that might help with this. Checked Extend.gf
on GitHub for more information about GF, and I found these three lines:
ANSWER
Answered 2022-Feb-11 at 02:48Just like with other list categories C
, you need to use a constructor that takes two (or more) C
s and creates a [C]
.
For categories that are in the RGL API, there are convenience opers of type mkC : Conj -> C -> C -> C
, but under the hood, those opers also need to call the proper constructors for [C]
. (The constructors are called BaseC
and ConsC
, and you can read more on lists here.)
So VPS
is not in the API, so there is no convenience oper with type signature Conj -> VPS -> VPS -> VPS
. Instead, you need to call BaseVPS
explicitly. Here is working code, I cut your long expression into smaller pieces.
QUESTION
I'm trying to calculate 19v^2 + 49v + 8
to the 67th power over the finite field Z/67Z using Sage where v = sqrt(-2)
.
Here's what I have so far (using t
instead of v
):
ANSWER
Answered 2022-Feb-09 at 22:44Computing with a square root of -2 amounts to working modulo the polynomial t^2 + 2.
The function power_mod
can be used for that.
Instead of first powering and then reducing modulo t^2 + 2, which would be wasteful, it performs the whole powering process modulo t^2 + 2, which is a lot more efficient.
Here are two ways to write the (same) computation.
QUESTION
To run transformers I installed it on CentOS 8 by
...ANSWER
Answered 2021-Dec-24 at 03:13I had the same issues, and I downgraded to the following version:
QUESTION
I have a mixed chart (scatter and line), hence I need 2 xAxis.
There's an extra grid that appears on the bottom of the chart, because that's where the other x axis normally has its labels (I removed them because I don't need them)
I'm trying to get rid of that extra grid, but I can't find how to do it. I've tried to specify the ticks color as white but the grid's still there.
Look at the image, it's that solitary extra grid at the bottom (marked with an horizontal bracket):
This is my code:
...ANSWER
Answered 2022-Jan-12 at 23:39In your config for the X axis where you set the ticks to display false, if you instead do this in the root of the X scale config it will hide that line so you will get:
QUESTION
I'm doing a ADFGVX cipher encoder and decoder and I have a polybius square where I need to read two letters.
...ANSWER
Answered 2022-Jan-12 at 10:11You could zip the string with an offset like this:
QUESTION
Following is the excerpt from the program: I have tried to re-produce as little code as possible to focus on the warning message.
...ANSWER
Answered 2022-Jan-11 at 11:02It just means that while computing the following expression:
QUESTION
It's simpler to just read the code and see the end result in the image, my question is why is Actuation Force and Bottom-out Force not aligned with the text views above them? In Actuation Force text view, there seems to be some mysterious padding added to its left while Bottom-out Force does not have it?
...ANSWER
Answered 2022-Jan-10 at 01:23On "Bottom-out Force," it looks like the first line is wide enough before it wraps words that it pushes the Text
width to the maximum width of the view. On the others, it gets wrapped with shorter line lengths, and then ends up adding padding to center the text within the view.
You can fix this by adding a .leading
alignment to your VStack
. For example:
QUESTION
I regularly use Vuejs and Webpack with the "@" character for file resolution, like so
...ANSWER
Answered 2022-Jan-04 at 20:59In the linked question, ~
is escaped because ~
has a special meaning for Vim's regexp engine: "matches the last given substitute string".
But @
is not special in any way so there is no need to escape it:
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