How to Remove Elements from a Vector by Value in C ?

How to Remove Vector Elements By Value in C

Consider the vector myVector containing the values {5, 9, 2, 8, 0, 7} in order. To erase the element holding the value "8" through its position, one could use:

myVector.erase(myVector.begin() + 4); // Erase the 4th element

Alternatively, to erase based on the value "8" directly, one can utilize the std::remove() function:

#include <algorithm>

int main() {
  std::vector<int> vec{5, 9, 2, 8, 0, 7};
  vec.erase(std::remove(vec.begin(), vec.end(), 8), vec.end());
  return 0;
}

In this case, std::remove() reorders the elements, moving "8" to the end of the vector, and then erase() effectively removes the moved element. This approach is known as the "erase-remove idiom."

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