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QUESTION
I have a graph g
ANSWER
Answered 2022-Apr-01 at 10:31You can use subgraph.edges:
QUESTION
I faced with some issue in Haskell: code-style and big functions (I'm continuing to learn Haskell through writing toy-language).
I have some necessary-big-function (see example). And there are two sub-function (nested where) in it. And there is no reason to place its sub-finction in module scoupe. How "Haskell code-style" or "Haskell code-style best practics" suggest to solve this problem of "ungraceful and clumsy code"?
Function (with later comment):
...ANSWER
Answered 2021-Dec-29 at 00:06And there is no reason to place its sub-function in module scope
Think about it the other way around. Is there any reason to put the sub-function in the local scope? Then do it. This could be because
- it needs to access locally bound variables. In this case it must be local, or else you need extra parameters.
- it does something very obvious and only relevant to the specific use case. This could be one-line definitions of some operation that you don't care thinking a properly descriptive name, or it could be a
gohelper that does basically the whole work of the enclosing function.
If neither of these apply, and you can give the local function a descriptive name (as you've already done) then put it in module scope. Add a type signature, which makes it clearer yet. Don't export it from the module.
Putting the function in module scope also removes the need to rename variables like you did with gdefs'. That's one of the more common causes for bugs in Haskell code.
QUESTION
Bob is a construction worker who does mathematics for increasing his efficiency. He is working on a site and has n buckets of cement-lined up with different characters (a – z) marked upon them. He has a strict command from the senior that he cannot change the order of the buckets.
Before starting his work, he has been given a string s of length n in which the character at position i (1 <= i <= n) gives us the mark on the i'th bucket. He can only carry one bucket at a time and bring it back to the base site. In each round, he has a criterion on which bucket to pick up. He will take the bucket with the smallest character marked upon it (a
Constraints
1 < t,m < 10^5
The sum of n over all test cases does not exceed 10^6
SAMPLE INPUT
2
badce
SAMPLE OUTPUT
7
Explanation
- badce - Firstly Bob takes the second basket with mark 'a' and adds 2 to the cost.
- bdce - Then he takes the first basket with the mark 'b' and adds 1 to the cost.
- dce - Then he takes the second basket with the mark 'c' and adds 2 to the cost.
- de - Again he takes the first basket with the mark 'd' and adds 1 to the cost.
- e - Again he takes the first basket with the mark 'e' and adds 1 to the cost.
The total cost becomes 7 units.
I have tried to code in Python but giving TLE for some cases. Here is my approach-->
...ANSWER
Answered 2022-Feb-28 at 20:15This runs in O(n). For every char, check how many previous chars will be transported later.
QUESTION
I am running below code in RStudio, and want to create sankey chart with plotly. code runs without error. but the sankey chart is not displayed. what's wrong here?
...ANSWER
Answered 2022-Feb-10 at 08:03You'll need to define the node position by setting the arrangement argument to stop plotly from automatically justifying the position.
This requires some finessing as you need to specify the coordinates of the nodes. You can find more details here: https://plotly.com/python/sankey-diagram/#define-node-position
CodeQUESTION
sample csv data:
date,Data Center,Customer,companyID,source,target,value 6/1/2021,dcA,customer1,companyID1,step1:open_list_view,exit,1 6/1/2021,dcB,customer2,companyID2,step1:open_list_view,exit,1 6/1/2021,dcC,customer3,companyID3,step1:open_list_view,exit,1 6/2/2021,dcD,customer4,companyID4,step1:open_list_view,exit,2 6/2/2021,dcE,customer5,companyID5,step1:open_list_view,step2:switch_display_option,1
I run below code for put the sankey chart in dashboard, and the chart can be updated accordingly by applying filters. but an error appears on dashboard. What is the issue?
...An object was provided as
childreninstead of a component, string, or number (or list of those). Check the children property that looks something like:
ANSWER
Answered 2022-Feb-06 at 12:22Your callback function returns a figure and is trying to assign it to the children property of a html.Div. Can't do that as far as I know. A div's child should be other components, strings or numbers as stated in the error message.
Did you mean to write
QUESTION
I'm facing a SQL request issue. I'm not a SQL expert and I would like to understand my mistakes. My use case is to get all records of the first table + records of the second table that are not present in the first table. I've got 2 tables like this :
First table "T-Finance par jalon ZOHO" (with 20 columns):
...ANSWER
Answered 2022-Jan-27 at 16:40Assuming the following:
- Both tables have have the exact same columns
- Uniqueness only is guaranteed on the entire row (that is, there is no primary key)
- Every row in each table IS unique, duplicates only exists across the row
Your only option is subquery together with DISTINCT.
QUESTION
We track an internal entity with java.util generated UUID. New requirement is to pass this object to a third party who requires a unique identifier with a max character limit of 11. In lieu of generating, tracking and mapping an entirely new unique ID we are wondering if it is viable to use a substring of the UUID as a calculated field. The number of records is at most 10 million.
java.util.UUID.randomUUID().toString() // code used to generate
Quotes from other resources (incl. SOF): "....only after generating 1 billion UUIDs every second for approximately 100 years would the probability of creating a single duplicate reach 50%."
"Also be careful with generating longer UUIDs and substring-ing them, since some parts of the ID may contain fixed bytes (e.g. this is the case with MAC, DCE and MD5 UUIDs)."
We will check out existing IDs' substrings for duplicates. What are the chances the substring would generate a duplicate?
...ANSWER
Answered 2022-Jan-20 at 17:28This is an instance of the Birthday Problem. One formulation of B.P.: Given a choice of n values sampled randomly with replacement, how many values can we sample before the same value will be seen at least twice with probability p?
For the classic instance of the problem,
p = 0.5, n = the 365 days of the year
and the answer is 23. In other words, the odds are 50% that two people share the same birthday when you are surveying 23 people.
You can plug in
n = the number of possible UUIDs
instead to get that kind of cosmically large sample size required for a 50% probability of a collision — something like the billion-per-second figure. It is
n = 16^32
for a 32-character string of 16 case-insensitive hex digits.
B.P. a relatively expensive problem to compute, as there is no known closed-form formula for it. In fact, I just tried it for your 11-character substring (n = 16^11) on Wolfram Alpha Pro, and it timed out.
However, I found an efficient implementation of a closed-form estimate here. And here's my adaptation of the Python.
QUESTION
I have below csv file where values in C_DS and C_RT could be multi-value.
...ANSWER
Answered 2022-Jan-07 at 11:04You can try this way. First, calculate the unique list of labels from your column as new table.
QUESTION
I have upgraded a TYPO3 project from v6 to v10.
Some content of DCE elements aren't working anymore, this is the code there:
TCA:
...ANSWER
Answered 2021-Nov-29 at 09:42Thanks @Julian! I have fixed this issue with change:
QUESTION
I am making a program in which I need many JTables. So for setting the font, column size etc. I am using this method:
...ANSWER
Answered 2021-Nov-23 at 14:58Don't use:
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