12,136 questions
3
votes
2
answers
259
views
Is iteration order of a set in Python preserved until that set is modified?
According to the Python documentation, set is a mutable unordered collection.
Usually, it's implemented as a hash table that stores references to objects as its keys. Comparing to dict (which is also ...
- 323
8
votes
3
answers
1k
views
How can I create an array of arrays of strings of varying lengths in C?
I am trying to solve the problem posed in this question. Here the OP asks that given a 15 element set, its 2^15 element power set be generated in a manner such that the elements of the power set are ...
- 469
4
votes
2
answers
172
views
Combination generator written in C : works for big n but for small n when n=0 or n=k crashes saying "segmentation fault"
Let's say I have a box and there is a bunch of balls in that box. I can label each ball with a character while making sure no two balls get the same character as labels. I get a string this way. Let's ...
- 469
0
votes
3
answers
81
views
How Do Sets and Set Comparisons Work in Python? [duplicate]
I'm learning Python coming from some beginner-level experience with Java. It all makes sense for the most part, but one of the exercises kind of made me wonder what actually happens within Python.
...
0
votes
2
answers
49
views
How can I add elements to an existing Set in GAMSPy?
I'm working with the GAMSPy Python API and using Set objects to define sets in a GAMS model. I can define a set like this:
from gamspy import Container, Set
m = Container()
regions = Set(m, name=&...
2
votes
3
answers
202
views
Writing a Von Neumann Ordinal generator in C : Problem with malloc
I want to write a computer programme that will do the following things :
1a. It will make an array 3 characters long.
£££
2a. It will then initialize the array with the string "{_}" and ...
- 469
1
vote
2
answers
59
views
A dead loop problem in JavaScript about Set
Why the following code caused dead loop？
const s = new Set([1]);
s.forEach(e => {
s.delete(e)
s.add(e)
})
I tried to change the order about delete and add operation,the dead loop ...
- 19
0
votes
2
answers
98
views
Would python function any() iterate or just locate the item if used with a hashset
to clarify, it would be used like any(set()). I am asking for efficiency sake.
Example: if any(fnmatch(a,b) for a in set)
where a would be an item in a set and b would be a string.
5
votes
3
answers
271
views
Fastest way to find the least amount of subsets that sum up to the total set in Python
Say I have a dictionary of sets like this:
d = {'a': {1,2,8}, 'b': {3,1,2,6}, 'c': {0,4,1,2}, 'd': {9}, 'e': {2,5},
'f': {4,8}, 'g': {0,9}, 'h': {7,2,3}, 'i': {5,6,3}, 'j': {4,6,8}}
Each set ...
- 2,963
0
votes
1
answer
40
views
Alternative for ajax with async true too slow
I have a serious problem with an app.
I have a selection box with types of services and other below with student names. Once selected the service, the students will be filtered to the ones that are ...
0
votes
0
answers
56
views
Delphi Extending a set with custom values [duplicate]
I'm looking for a way to extend the tFieldType with my own custom types.
I've tried
type
pSetExtendedFieldTypes = (ftAlpha, ftAlphaNumeric, ftNumeric);
pSetNativeFieldTypes = tFieldType;
pSetDataTypes ...
- 689
0
votes
1
answer
122
views
Why does 'set /a counter=counter+1' work without using %% in a batch script?
in this code I think I have to write set /a counter=%counter%+1 but I just tried write it without %% and interestingly it works I don't how?! can anyone explain it
@echo off
setlocal ...
- 33
2
votes
3
answers
138
views
How to use output iterators without a container: Set intersection without storage
The C++ reference has this example for printing the intersection of two sets (or sorted containers):
#include <algorithm>
#include <iostream>
#include <iterator>
#include <vector&...
- 580
-1
votes
1
answer
35
views
Error setting sublist value Netsuite client script
I am trying to set sublist value on suietelet in a client script.
Getting error as:
cannot read properties of undefined reading 0.
Please advise Thank You!
Below is client script sample.
function ...
- 121
1
vote
1
answer
53
views
Automation error due to 1000+ workbooks opened and closed
Me and my colleagues have created around 14.000 copies of a certain workbook in the last 8 years or so. Pretty simple lightweight workbook, few userforms, some code, 2 sheets with a variable amount of ...
- 11