vector Archives - IT Nursery

Programming, r

IT Nursery

Append value to empty vector in R?

I’m trying to learn R and I can’t figure out how to append to a list. If this were Python I would . ...

June 3, 2022
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C++, Programming

IT Nursery

How do I reverse a C++ vector?

Is there a built-in vector function in C++ to reverse a vector in place? Or do you just have to do it manually? ...

June 3, 2022
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Programming, r

IT Nursery

How to find common elements from multiple vectors?

Can anyone tell me how to find the common elements from multiple vectors? a <- c(1,3,5,7,9) b <- c(3,6,8,9,10) c <- c(2,3,4,5,7,9) I ...

June 2, 2022
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C++, Programming

IT Nursery

When vectors are allocated, do they use memory on the heap or the stack?

Are all of the following statements true? vector<Type> vect; //allocates vect on stack and each of the Type (using std::allocator) also will be ...

June 1, 2022
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Programming, r

IT Nursery

Convert data.frame column to a vector?

I have a dataframe such as: a1 = c(1, 2, 3, 4, 5) a2 = c(6, 7, 8, 9, 10) a3 = c(11, ...

May 31, 2022
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math, Programming

IT Nursery

How do I calculate the normal vector of a line segment? [closed]

Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers. This question does not appear to be about ...

May 31, 2022
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C++, Programming

IT Nursery

How to initialize std::vector from C-style array?

What is the cheapest way to initialize a std::vector from a C-style array? Example: In the following class, I have a vector, but ...

May 29, 2022
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C++, Programming

IT Nursery

How to initialize a vector in C++ [duplicate]

This question already has answers here: What is the easiest way to initialize a std::vector with hardcoded elements? (29 answers) Closed 2 years ...

May 29, 2022
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Programming, scala

IT Nursery

When should I choose Vector in Scala?

It seems that Vector was late to the Scala collections party, and all the influential blog posts had already left. In Java ArrayList ...

May 29, 2022
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C++, Programming

IT Nursery

Thou shalt not inherit from std::vector

Ok, this is really difficult to confess, but I do have a strong temptation at the moment to inherit from std::vector. I need ...

May 27, 2022
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