python (12.9k questions)

javascript (9.2k questions)

reactjs (4.7k questions)

java (4.2k questions)

java (4.2k questions)

c# (3.5k questions)

c# (3.5k questions)

html (3.3k questions)

Questions - set

Scala: Set of tuples doesn't allow me to add a "straight" tuple

I have this code of a mutable Hashmap with a mutable Set with tuples: val field = mutable.HashMap[String, mutable.Set[(Pos3, Pos3)]]() In foreach loop I'm populating the field scanner.combinations(...
test-img

dr jerry

scala

hashmap

set

tuples

Votes: 0

Answers: 1

Latest Answer

Remember that when you do foo += x that is just sugar syntax for foo.+=(x) (i.e. omit the dot and the parenthesis) But when you do foo += (x, y) the compiler thinks you are just omitting the dot inste...
test-img

Luis Miguel Mejía Suárez

Using update() method for two duplicate sets

I want to add two duplicate sets together. Why does my code return None? firstset = {1, 2, 3} secondset = {1, 2, 3} thirdset = firstset.update(secondset) print(thirdset)
test-img

Amir Sharifi

python

set

Votes: 0

Answers: 5

Latest Answer

This occurs because you're assigning the return value of .update() to thirdset. The updates occur in-place (i.e. they mutate firstset), and the function returns None. The code snippet below shows what...
test-img

BrokenBenchmark

Filter result from a single name in a SET with multiple entries

I have a column of SET type made up of creators of comic books. In PHP, I do a query to get all the comics with a single creator. If I do a query using WHERE creator = "John Byrne", I can se...
test-img

Mehdi Bouhalassa

php

mysql

list

set

where-clause

Votes: 0

Answers: 0

What is the use case for Set.prototype.entries()?

In JavaScript there is a method entries() that returns an iterator object with array of the key and value for each item in the Set. But key and value in Set are the same thing. So what would be the us...
test-img

JoeTidee

javascript

set

Votes: 0

Answers: 0

Posts

Questions

Blogs

Jobs