Questions tagged [set]
A set is a collection in which no element is repeated, which may be able to enumerate its elements according to an ordering criterion (an "ordered set") or retain no order (an "unordered set").
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How to find duplicates in a text file in python and create a new text file with out them
I am trying to remove duplicates from text files to make a current process more efficient
Example input:
1 1
1 1
2 1
3 1
4 1
Example Output:
1 1
2 1
3 1
4 1
my issue is when ...
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2
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51
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Why it Kotlin's Set implementation mutable under the hood?
I just noticed something interesting about Kotlin's Set data structure and its interaction with Java.
Consider a List object first. If I have this code in Kotlin:
private val aList = listOf(1,2,3)
...
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Counting OTPs by Sender, Missing first four OTPs from Senders(first) even if the sender has more than 5 Counts
import re, csv
import pandas as pd
class OTPAnalysis:
def __init__(self) -> None:
self.total_otp = []
self.count = 0
self.df = None
self.sender_count = {}
...
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JavaScript Set not working correctly locally? [closed]
I'm writing a little tool in NodeJS v20.13.0 and I'm using Sets to avoid handling directly duplicate data.
When using the difference method between two set I got the following error:
Code example
...
- 2,652
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How do You Convert a List of Strings into a Frozenset and Add it to a Set of Frozensets?
I have a variable with n words, separated by whitespaces. str.split() returns a list of these words, which is then converted to a tuple with tuple(), which is finally converted to a frozenset and ...
0
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1
answer
83
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reference_wrapper in c++ containers
Consider following snippet:
#include <bits/stdc++.h>
using namespace std;
int main() {
int x=3;
int y=1;
int z=2;
cout<<(&x)<<' '<<(&y)<<' '<&...
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Data rolled back after 5-7 minutes of running the update on table successfully
I ran an update on the SQL table using the below code, and it updated the table correctly. But after 5-7 minutes, the data rolls back. Why does this happen? I don't see any logs or errors in the SQL ...
-2
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1
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51
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Why could I allow a duplicate on Kotlin's sets? [closed]
It is known that the set in Kotlin prohibits the content of duplicates. But I was able to create such a set:
var c = Card2.`2c`
var cards3: Set<Card2> = setOf(c, c)
Why is this acceptable? Or ...
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0
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57
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set c++ own comparator function find could not find an already inserted element [duplicate]
I wrote an comparator function for my set which will store an vector of 3 elememts.
Those 3 elements will be sorted always.
Now i insert the 2 elements in the set. But when i try to find the 2nd ...
0
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1
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34
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Conditional Classname with Tailwind React Not Updating Style
selectedTopics.has(topic) is not returning True when it should in this case to display the conditional styling. When I replace selectedTopics.has(topic) with true, the conditional styling is applied ...
3
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3
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searching performance in list is better than in set
Searching an element in a set takes O(1) time complexity while searching in a list takes O(n) time complexity. The n is the number of elements in a set or list.
In my test on the real searching time ...
- 39
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59
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TypeError: unhashable type: 'numpy.ndarray' in array to set
in this def i get TypeError: unhashable type: 'numpy.ndarray' in line retrieved_indices_set = set(retrieved_indices)
def evaluate_retrieval(query_idx, retrieved_indices, relevant_indices):
# ...
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Julia equivalent for MatLab ismembertol
I have two different datasets, say A of dimension (N1,3) and B(N2,3).
I want to identify the rows in A which are approximately equal to some rows in B with tolerances tol = [tol1, tol2, tol3].
In ...
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How to add/remove an element from a set in Java while iterating [duplicate]
I know there's a way to do it with ListIterator, but I can't find a SetIterator. Is doing something like this even possible?
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Overloading Set in Swift
Some background
I am very new to Swift and MacOS and trying to learn the Swift way to do things. This started because I realized that tuples are not hashable so I rolled my own:
struct XY: Hashable
{
...
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