vector Questions
3
Context
Let us consider 5 x 5 lattice with each point indexed as (1,1),(1,2),...(1,5),(2,1),...,(5,5), and call this lattice L.
What I want to do
I want to make a 5 x 5 matrix with each element hav...
Irvine asked 13/12, 2021 at 10:26
2
Solved
I'm learning Rust and am trying to get used to working with Results and Options. Given a vector of either. If i only want the results that did not err (or aren't none for Option), is there a more g...
4
Solved
I would like to know how can I find the index positions of elements that verify a certain condition (for example greater than). For example if I have a vector of int values
vector<int> V;
...
2
Solved
What is the best way in Julia to vectorize a function along a specific axis? For example sum up all the rows of a matrix. Is it possible with the dot notation?
sum.(ones(4,4))
Does not yield the d...
Sextan asked 2/12, 2021 at 11:57
5
Solved
I found this way, but it seems too verbose for such a common action:
fn double_vec(vec: Vec<i32>) -> Vec<i32> {
let mut vec1 = vec.clone();
let vec2 = vec.clone();
vec1.extend(v...
3
Solved
I have two vectors:
a <- c(1, 1, 3, 4, 5, 7, 9)
b <- c(2, 3, 4, 6, 8, 2)
I want to find the numbers in the second vector, which are not in the first vector:
dif <- c(2, 6, 8)
I've tr...
5
Solved
Container requirements have changed from C++03 to C++11. While C++03 had blanket requirements (e.g. copy constructibility and assignability for vector), C++11 defines fine-grained requirements on e...
2
Solved
I drag pdf intro image assets (universal) and building Xcode.
There is no generated png@2 png@3 . (only Pdf)
I follow this tutorial :
https://icons8.com/articles/how-to-use-vectors-in-xcode-7/
...
6
Solved
Hi I want to (multiply,add,etc) vector by scalar value for example myv1 * 3 , I know I can do a function with a forloop , but is there a way of doing this using STL function? Something like the {Al...
5
Solved
I was trying to solve this problem.
An integer M and a non-empty zero-indexed array A consisting of N
non-negative integers are given. All integers in array A are less than
or equal to M.
A...
Bettor asked 28/11, 2016 at 15:22
3
Solved
I am wondering if it is possible to convert a vector of derived class values to a vector of base class values. Specifically I want to be able to pass a vector of base class objects to a function wh...
Tashinatashkent asked 18/4, 2011 at 2:42
6
Solved
I'd like to have a vector of unique_ptr's as a member of a class I'm making.
class Foo {
[...]
private:
vector<unique_ptr<Bar>> barList;
}
But then I start getting cryptic error m...
Ningsia asked 24/1, 2012 at 14:15
5
Solved
According to Bjarne Stroustrup's slides from his Going Native 2012 keynote, insertion and deletion in a std::list are terribly inefficient on modern hardware:
Vector beats list massively for i...
Cleliaclellan asked 8/12, 2012 at 17:6
2
Solved
You have an array of integers.
In one step, you can change the value at any index into any integer value.
What is the minimum number of steps in which you can make the array non-decreasing?
Eg 1:
...
Omeara asked 6/11, 2021 at 8:27
17
Solved
I'm using vector drawables in android prior to Lollipop and these are of some of my libraries and tool versions:
Android Studio : 2.0
Android Gradle Plugin : 2.0.0
Build Tools : 23.0.2
Android...
Northernmost asked 26/4, 2016 at 14:4
12
Solved
C++ has std::vector and Java has ArrayList, and many other languages have their own form of dynamically allocated array. When a dynamic array runs out of space, it gets reallocated into a larger ar...
Ment asked 8/7, 2009 at 20:15
2
Solved
According to the answers in this question, std::vector<bool> implements "special" logic (to allow each boolean value to be stored in a single bit, rather than taking up an entire by...
Hassle asked 3/11, 2021 at 15:16
2
My pitches and yaws are messed up.
I have the pitch and yaw of the pad but the beam's pitch and yaw are messed up.
How do i calculate the normal vector for the pad's pitch and yaw? I tried a cr...
2
Solved
I have a vector like below
tmp <- c(a=1, b=2, c=3)
a b c
1 2 3
I want to flatten this vector to get only 1, 2, 3.
I tried unlist(tmp) but it still gives me the same result.
How to ach...
5
I need to insert values into the beginning of a std::vector and I need other values in this vector to be pushed to further positions for example: something added to beginning of a vector and values...
Unset asked 14/1, 2018 at 15:42
5
Solved
I have a vector of random positive integers. I would like to select only those elements of the vector whose sum will be exactly equal to a certain predetermined value.
Let's take an example like th...
Faustino asked 17/10, 2021 at 21:45
7
Solved
I have a large, but potentially varying, number of objects which are concurrently written into. I want to protect that access with mutexes. To that end, I thought I use a std::vector<std::mutex&...
Noose asked 9/5, 2013 at 15:37
10
Solved
I am attempting to use vector drawables in my Android app. From http://developer.android.com/training/material/drawables.html (emphasis mine):
In Android 5.0 (API Level 21) and above, you can de...
3
Solved
I have immutable vectors a and b where the elements are cheap to copy and I want to create a vector that forms the concatenation of these existing vectors without changing them (*).
An earlier ques...
Anciently asked 25/11, 2018 at 16:2
6
vector<string> v;
v.push_back("A");
v.push_back("B");
v.push_back("C");
v.push_back("D");
for (vector<int>::iterator it = v.begin(); it!=v.end(); ++it) {
//printout
cout << *it...
© 2022 - 2024 — McMap. All rights reserved.