tuples Questions
13
Solved
Python's list type has an index() method that takes one parameter and returns the index of the first item in the list matching the parameter. For instance:
>>> some_list = ["apple", "pear...
Pruitt asked 3/6, 2009 at 20:1
0
Per the Rust FFI Omnibus the following should work.
This is a rust cdylib lib.rs named "foo" made with cargo build...
use std::convert::From;
// Rust FFI Omnibus: Tuples
// http://jakeg...
Pender asked 28/5, 2022 at 14:43
9
Solved
So I am trying to do this:
tuple([1])
The output I expect is :
(1)
However, I got this:
(1,)
But if I do this:
tuple([1,2])
It works perfectly! like this:
(1,2)
This is so weir...
Fundus asked 15/4, 2016 at 3:4
5
Here is my example:
>>> a=input ('some text : ') # value entered is 1,1
>>> print (a)
1,1
I want as a result a tuple (1, 1)
How can I do this?
Douche asked 9/12, 2013 at 22:43
2
Solved
I tried to use Map.map to convert a map into a List of Tuples.
However this fails. I did the following experiments:
val m = Map(("a" -> 1), ("b" -> 2))
//> m : scala.collection.immutable...
Roundel asked 27/2, 2015 at 16:6
2
Solved
How to call a template function for each type in a typelist with arguments (e.g. another tuple)?
Given is a typelist std::tuple<T1, T2, T3, ...> and a std::tuple containing data.
template <...
1
Solved
I read in HackingWithSwift that Swift tuples can be compared with == operator only when the number of elements is less than or equal to 6. What is the reason behind this limitation ?
2
Solved
While implementing a compressed_tuple class for some project I'm working on, I ran into the following issue: I can't seem to pass instances of this type to std::apply, even though this should be po...
4
Solved
I am trying to convert a nested list of lists into a list of tuples in Python 3.3. However, it seems that I don't have the logic to do that.
The input looks as below:
>>> nested_lst = ...
Redeploy asked 21/9, 2013 at 22:21
4
Solved
The existing tuple overloads of std::get are limited to return exactly 1 element by index, or type. Imagine having a tuple with multiple elements of the same type and you want to extract all of the...
7
Solved
I just started with python and very soon wondered if indexing a nested list with a tuple was possible. Something like: elements[(1,1)]
One example where I wanted to do that was something similar t...
Volscian asked 20/5, 2015 at 5:31
2
Solved
JSON serializer returns an empty JSON object.
using System.Text.Json;
(int, int) tuple1 = (1, 2);
var token = JsonSerializer.Serialize(tuple1); // return empty object {}
(int item1, int item2) tu...
Pastel asked 21/12, 2021 at 14:2
22
Solved
What's the difference between tuples/lists and what are their advantages/disadvantages?
4
Solved
I'm creating a dictionary d of one million of items which are tuples, and ideally I'd like to access them with:
d[1634].id # or d[1634]['id']
d[1634].name # or d[1634]['name']
d[1634].isvalid # or ...
Lackaday asked 5/12, 2020 at 17:34
4
Solved
In C++0x, one can create a constexpr std::tuple, e.g. like
#include <tuple>
constexpr int i = 10;
constexpr float f = 2.4f;
constexpr double d = -10.4;
constexpr std::tuple<int, float, do...
2
Solved
I am using C# 8.0 with NullableContextOptions (Nullable Reference) enabled.
I have a function with this signature:
public static (int line, string content)? GetNextNonEmptyLineDown(this IList<...
Gerek asked 2/3, 2019 at 18:23
6
Solved
I'd like to know how are tuple implemented in standard library for C++0x. I tried to read description in libstdc++ manual and then read template listing, but it's really hard to understand how it w...
2
TypeError at /api/team/
The `fields` option must be a list or tuple or "__all__". Got str.
Request Method: GET
Request URL: http://127.0.0.1:8000/api/team/
Django Version: 1.9
Exception Type: TypeE...
Lentissimo asked 28/3, 2016 at 14:47
5
Solved
Here is the dataset.
library(data.table)
x <- structure(list(id = c("A", "B" ),
segment_stemming = c("[('Brownie', 'Noun'), ('From', 'Josa'), ('Pi', 'Noun')]",
...
Flip asked 11/3, 2022 at 10:49
3
Solved
Typescript in tuple allows to add extra elements with any of types used before, but I would like to limit the length. I've tried with & { length: 2 }, but it didn't helped:
declare var a: [str...
Allover asked 24/9, 2018 at 18:16
3
>>> x = ()
>>> type(x)
tuple
I've always thought of , as the tuple literal 'constructor,' because, in every other situation, creating a tuple literal requires a comma, (and paren...
5
Solved
I want to use a class instance as a dictionary key, like:
classinstance = class()
dictionary[classinstance] = 'hello world'
Python seems to be not able to handle classes as dictionary key, or am...
Volleyball asked 26/9, 2011 at 19:22
7
I'm using the new tuple value types in .net 4.7. In this example I am trying to make a switch statement for one or more cases of a tuple:
using System;
namespace ValueTupleTest
{
class Program
{...
Haakon asked 4/6, 2017 at 15:20
8
Solved
How and "could be" organized return from the method which returns tuple type with the name of parameters,
as an example
private static Tuple<string, string> methodTuple()
{
return new...
9
Solved
I have a piece of c++11 code similar like below:
switch(var) {
case 1: dosomething(std::get<1>(tuple));
case 2: dosomething(std::get<2>(tuple));
...
}
Is there any way to remove t...
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