tuples Questions
3
Solved
Is there a way to get one value from a tuple in Python using expressions?
def tup():
return (3, "hello")
i = 5 + tup() # I want to add just the three
I know I can do this:
(j, _) = tup()
i = ...
4
Solved
I know lambda doesn't have a return expression. Normally
def one_return(a):
#logic is here
c = a + 1
return c
can be written:
lambda a : a + 1
How about write this one in a lambda function...
5
Solved
I have a problem with the type of one of my column in a pandas dataframe. Basically the column is saved in a csv file as a string, and I wanna use it as a tuple to be able to convert it in a list o...
3
Solved
I would have thought that a list of tuples could easily be flattened:
scala> val p = "abcde".toList
p: List[Char] = List(a, b, c, d, e)
scala> val q = "pqrst".toList
q: List[Char] = List(p,...
5
Solved
I have a list of tuples like this:
[('foo','bar'),('foo1','bar1'),('foofoo','barbar')]
What is the fastest way in python (running on a very low cpu/ram machine) to swap values like this...
[('bar'...
5
Swift Tuple index using a variable as the index?
Anyone know if it is possible to use a variable as the index for a Swift tuple index. I wish to select and item from a tuple using a random number. ...
2
Solved
I've two IEnumerable<double>s, that I want to build an IEnumerable of Tuple<int, double, double> from. Item1 of the Tuple should be the index of the item, Item2 the value in index-th pl...
5
Solved
I'm trying to write a haskell function that takes in two lists of integers and generates a list with elements that have been taken alternatingly from the two lists.
I have the function:
blend xs...
Buber asked 12/12, 2011 at 6:20
2
Solved
I have:
val DF1 = sparkSession.sql("select col1,col2,col3 from table");
val tupleList = DF1.select("col1","col2").rdd.map(r => (r(0),r(1))).collect()
tupleList.foreach(x=> x.productIterator...
Predominate asked 24/1, 2017 at 14:38
3
Solved
type a = [1,2,3]
type Invert<T extends any[] & {'0': any}> = ???
type b = Invert<a> // should yield [3,2,1]
I am stucked to figure out the definition of Invert type of a tuple,
al...
Triplenerved asked 9/1, 2020 at 6:47
5
Solved
Suppose I have a function like:
def myfun(a, b, c):
return (a * 2, b + c, c + b)
Given a tuple some_tuple = (1, "foo", "bar"), how would I use some_tuple to call myfun? This s...
Ultun asked 3/1, 2010 at 2:22
5
Solved
Here's how I'm currently converting a list of tuples to dictionary in Python:
l = [('a',1),('b',2)]
h = {}
[h.update({k:v}) for k,v in l]
> [None, None]
h
> {'a': 1, 'b': 2}
Is there...
Albuminate asked 29/6, 2011 at 14:35
1
Just curious why I can't do this:
let myFn (data : obj) =
match data with
| :? (string * string) as (s1, s2) -> sprintf "(%s, %s)" s1 s2 |> Some
| :? (string * string * int) as (...
Freed asked 9/11, 2020 at 7:31
2
Solved
I'd like to define a concept which just tuples with values of a specific type can satisfy.
Let's say for simplicity I just want to accept tuples just holding elements of a numeric type. How would I...
Bitch asked 5/11, 2020 at 9:14
4
Solved
I can't pass a tuple as a method parameter:
scala> val c:Stream[(Int,Int,Int)]= Stream.iterate((1, 0, 1))((a:Int,b:Int,c:Int) => (b,c,a+b))
<console>:11: error: type mismatch;
found :...
3
Solved
I create my Tuple and add it to a combo box:
comboBox1.Items.Add(new Tuple<string, string>(service, method));
Now I wish to cast the item as a Tuple, but this does not work:
Tuple<stri...
3
Trying to make a list tuple of two Integers and after that adding something in it. Then comparing if x,y is one of the tuples in list tuple.
List<Tuple<int, int>> monsterPositions;
I...
Illegitimacy asked 24/10, 2017 at 6:57
6
Solved
I have a list of tuples, the list can vary in length between ~8 - 1000 depending on the length of the tuples. Each tuple in the list is unique. A tuple is of length N where each entry is a generic ...
Historicity asked 29/9, 2020 at 15:23
1
Solved
I want to specify how the rest of the array should look without knowing how many values the array will have. How can I achieve something like this? (playground version here):
type numStrArr = [num...
Disforest asked 5/7, 2017 at 19:30
2
I'm new to Haskell, I have a question regarding tuples. Is there not a way to traverse a tuple? I understand that traversal is very easy with lists but if the input is given as a tuple is there not...
1
Solved
I was curious to see whether sorting a vector <vector<int>> would be slower than sorting a vector <array <int, 3>>. The dimensions of the vector is 1000000 by 3, and below i...
4
Solved
I usually create custom structs when grouping values of different types together. This is usually fine, and I personally find the named member access easier to read, but I wanted to create a more g...
9
Solved
Is there any performance difference between tuples and lists when it comes to instantiation and retrieval of elements?
Abortionist asked 16/9, 2008 at 1:43
3
Solved
I'm trying to deconstruct a tuple inside a Linq expression
// somewhere inside another method
var result = from word in words
let (original, translation) = Convert(word)
select original
Here is ...
5
Solved
Is it possible to simulate extended tuple unpacking in Python 2?
Specifically, I have a for loop:
for a, b, c in mylist:
which works fine when mylist is a list of tuples of size three. I want t...
Ethanol asked 17/3, 2011 at 1:5
© 2022 - 2024 — McMap. All rights reserved.