What are vectors and how are they used in programming?
I'm familiar with the mathematical/physics concept of a vector as a magnitude and a direction, but I also keep coming across references to vectors in the context of programming (for example …
Function for selecting even numbers in a vector in R
lapply is really over-engineering doing "math" on a vector. (So is a for loop, admittedly, but homework is homework.) Beware (in general) that "growing objects", i.e., iteratively appending …
Postgresql and pgvector: the extention vector is not available
Jan 15, 2024 · HINT: Extensions must first be installed on the system where PostgreSQL is running. Since I see C:\... I'm going to assume you installed Postgres using the EDB installer. I …
How to sum up elements of a std::vector? - Stack Overflow
What are the good ways of finding the sum of all the elements in a std::vector? Suppose I have a vector std::vector<int> vector with a few elements in it. Now I want to find the sum of all the
Vector arguments in Boost Program Options - Stack Overflow
May 13, 2013 · I have two related questions: What is the simplest way to allow passing a series of values, using Boost Program Options? My aim is to avoid prog --opt 1 --opt 2 --opt 3 and have …
Unable to install pgvector extension for PostgreSQL [Windows]
Jul 13, 2023 · I am trying to use PostgreSQL as a vector database. And for the same I installed PostgreSQL to my windows system using the instructions provided here. To install pgvector, I …
simd - What is "vectorization"? - Stack Overflow
Sep 14, 2009 · Many CPUs have "vector" or "SIMD" instruction sets which apply the same operation simultaneously to two, four, or more pieces of data. Modern x86 chips have the SSE …
What's the most efficient way to erase duplicates and sort a vector?
Jun 25, 2009 · If you had relatively many duplicates, creating a set from the vector and letting it do the heavy lifting could easily beat it. Don't just concentrate on time efficiency either.
c++ - Vector insert () causes program to crash - Stack Overflow
May 1, 2010 · This is the first part of a function I have that's causing my program to crash: vector<Student> sortGPA (vector<Student> student) { vector<Student> sorted; Student test =
why do i need to include <vector> to use them? - Stack Overflow
Jul 6, 2016 · 8 I am new to C++ and trying to figure out how to use vector. More specifically, I want to know when I need to use #include<vector>. I am asking that because I have seen …