set Questions
4
I know that JavaScript now has sets, but I wonder if there is something to realize the function of multiSet, or if there is some framework that has the functions of multiset which I really need a l...
Saldivar asked 21/8, 2015 at 4:12
3
How do I use the SET command in windows for floating point arithmatic. /A stands for arithmetic and %VAR% prints the data of VAR not the name.
For example when I do:
SET /A VAR="2.5+3.1"
ECHO %VA...
Stormy asked 20/9, 2014 at 16:59
6
I have a HashSet of byte[]s and I would like to test whether a new byte[] is in that set. The problem is that Java seems to be testing whether the byte[] instances are the same rather than testing ...
6
Solved
I need to find how many elements are lower than a given one in a std::set.
I thought the right function to use was std::lower_bound which returns an iterator to the first element which is greater ...
9
Solved
I am new to python and learning it now. I am practicing it online and came across with the below problem. I tried to solve it, however, though I am getting the expected result the online validator ...
Monometallism asked 1/10, 2018 at 15:30
3
Solved
I've been reading conflicting answers about modern javascript engines' time complexity when it comes to sets vs arrays in javascript.
I completed the demo task of codility, which is a simple assign...
Duren asked 10/12, 2020 at 17:53
4
Solved
I know how to create a Map<T, List<U>> , using Collectors.groupingBy:
Map<Key, List<Item>> listMap = items.stream().collect(Collectors.groupingBy(s->s.key));
How would ...
Mesmerism asked 25/2, 2019 at 9:45
9
Solved
I can't understand the logic behind the terms intersection types and union types in TypeScript. I'm thinking of interfaces (or classes) as sets of properties.
The logical conjunction operator &...
Wasteful asked 9/8, 2016 at 16:21
4
Solved
What is the best way to check whether a certain value is in a string slice? I would use a Set in other languages, but Go doesn't have one.
My best try is this so far:
package main
import "fmt"
...
6
Solved
If i create 2 lists from the same set, can I be sure that I get the same ordering in both the lists? (I do not care about the ordering as long as both the lists have the same order and I am not per...
6
I am trying to build unique array of arrays such that whenever I have new array to add it should only add if it doesn't already exist in collection
E.g. store all unique permutations of [1,1,2]
Act...
Crandell asked 4/5, 2017 at 1:14
3
Solved
If I have an object that compares equal to an element of a Python set, but is not the same object, is there a reasonable way to get a reference to the object in the set? The use case would be using...
Loeffler asked 23/12, 2011 at 12:48
19
Solved
How do you compare two javascript sets? I tried using == and === but both return false.
a = new Set([1,2,3]);
b = new Set([1,3,2]);
a == b; //=> false
a === b; //=> false
These two sets ar...
Carpo asked 30/6, 2015 at 3:4
8
Solved
To create all possible combinations of two sets of parameters and perform an action on them, you can do:
setOf(foo, bar, baz).forEach { a ->
setOf(0, 1).forEach { b ->
/* use a and b */
}...
Unreserve asked 12/12, 2018 at 18:38
4
Solved
How can I check whether the first "n" elements of two vectors are equal or not?
I tried the following:
#include <iostream>
#include <vector>
#include <iterator>
using namespace ...
6
Is it possible to return multiple result sets from a PostgreSQL function, like in MSSQL:
CREATE FUNCTION test
AS
SELECT * FROM first_table
SELECT * FROM second_table
Outsail asked 16/4, 2009 at 15:31
17
Solved
Recently I noticed that when I am converting a list to set the order of elements is changed and is sorted by character.
Consider this example:
x=[1,2,20,6,210]
print(x)
# [1, 2, 20, 6, 210] # the o...
6
Solved
I am porting some C++ code to Python and one of the data structures is a multiset, but I am not sure how to model this in Python.
Let ms be the C++ multiset<int>
How ms is used (posting som...
4
I've been looking around for a Java list, set, or something similar that has entries expire after a given time period, but I have yet to find one. I've found Guava's CacheBuilder, which would be al...
6
Solved
How can I iterate through items of a LinkedHashSet from the last item to the first one?
Shuttle asked 24/5, 2012 at 16:51
4
Solved
How to Store unique objects to avoid the duplicates in java Set?
For example
Consider Employee object which (Employee Id, name, salary....)
list of employee of objects need to add in the Set.
We...
7
Solved
How can I select a random element in an std::set?
I naively tried this:
int GetSample(const std::set<int>& s) {
double r = rand() % s.size();
return *(s.begin() + r); // compile erro...
5
Solved
I am trying to define and initialize a MySQL variable for a query.
I have the following:
DECLARE @countTotal INT;
SET @countTotal = SELECT COUNT(*) FROM nGrams;
I am using MySQL in Netbeans and it...
Pleurodynia asked 2/12, 2012 at 15:24
3
The error
Cannot delete or update a parent row: a foreign key constraint fails.
The classes
class Teacher {
/**
*@ORM\OneToMany(targetEntity="publication", mappedBy="teacher")
*/
protected ...
Biddable asked 13/1, 2012 at 23:29
2
Solved
Consider the following toy example of an std::set with a custom comparator:
#include <set>
struct A {
A() : a(cnt++) {}
const int a;
static int cnt;
};
int A::cnt = 0;
struct comp {
b...
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