How to Erase Vector Elements Based on Value in C ?

Erasing Vector Elements Based on Value in C

The issue arises when attempting to erase a vector element based on its value rather than its position. Consider a vector with the following values:

5 9 2 8 0 7

Typically, we might erase the fourth element containing the value "8" using this code:

myVector.erase(myVector.begin() + 4);

However, is there a more direct way to erase an element by its value?

std::remove() to the Rescue

The std::remove() function comes into play here. It removes elements from a range that match a specific value. Combined with erase(), we can use the erase-remove idiom to achieve our goal:

#include <algorithm>

...

myVector.erase(std::remove(myVector.begin(), myVector.end(), 8), myVector.end());

This combination iterates through the vector, removes all instances of "8," and then erases the modified range. The resulting vector now contains:

5 9 2 0 7

The above is the detailed content of How to Erase Vector Elements Based on Value in C ?. For more information, please follow other related articles on the PHP Chinese website!