C++11 introduced by default several of the smart pointer types, e.g., unique pointers, shared pointers, etc. One of the features it was lacking was the ability to pass in a unique_ptr into a lambda expression. For example, the following wouldn’t work: This is because lambda’s capture list requires a copyable object to be passed in.…
A raw pointer is usually initialized to the value of NULL in C++: int* aNum = NULL; This indicates that the pointer aNum points to the value of 0 in most implementations. It can be thought of as a 0 in mathematics, where the length of the following vector is 0 and the direction is…
To launch a new thread to perform a task in C++11, one can make use of the standard thread library. The following code shows how to create a thread and execute a set of instructions:
There are some nice C++11 APIs available to measure the execution times of a function(s). The library of interest here is <chrono>. It provides some basic methods to obtain timing information from the CPU. I generally use the following pattern to determine timing information for my code: See the C++ documentation for other methods included in the…
I’ve recently been thinking about the following question: When does one use the Hadamard product or array multiplication of two matrices? If you have two m x n matrices, A and B, with elements {aij} and {bij}, respectively. Also, i and j are indices for the row and column of the matrices. Then their Hadamard…
