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I'm using multitreading and want to merge the results. For example:
std::vector<int> A; std::vector<int> B; std::vector<int> AB; I want AB to have to contents of A and the contents of B in that order. What's the most efficient way of doing something like this?
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Description. The Vector Concatenate and Matrix Concatenate blocks concatenate the input signals to create a nonvirtual output signal whose elements reside in contiguous locations in memory. In the Simulink® library, these blocks are different configurations of the same block.
Concatenate function: This method combines the arguments and results in a vector. All the arguments are converted to a common type that is the return value type. This function is also used to convert the array into vectors.
To insert/append a vector's elements to another vector, we use vector::insert() function. Syntax: //inserting elements from other containers vector::insert(iterator position, iterator start_position, iterator end_position);
AB.reserve( A.size() + B.size() ); // preallocate memory AB.insert( AB.end(), A.begin(), A.end() ); AB.insert( AB.end(), B.begin(), B.end() ); This is precisely what the member function std::vector::insert is for
std::vector<int> AB = A; AB.insert(AB.end(), B.begin(), B.end()); If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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