How to Slice a Vector in C++ - Step by Step Examples

How to Slice a Vector in C++ ?

Answer

To slice a vector in C++, you can use iterators or standard algorithms like std::copy or std::vector::assign to create a new vector with the desired elements.

✐ Examples

1 Slice a Vector by Iterator Range

In this example,

We create a vector named v1 containing some elements.
We define iterator begin and end points for the range of elements we want to slice.
We use the constructor of std::vector with the iterator range to create a new vector containing the sliced elements.

C++ Program

// Slice a vector by iterator range
#include <iostream>
#include <vector>

int main() {
    std::vector<int> v1 = {1, 2, 3, 4, 5};
    auto start = v1.begin() + 1;
    auto end = v1.begin() + 4;
    std::vector<int> sliced_v1(start, end);
    for (auto& elem : sliced_v1) {
        std::cout << elem << " ";
    }
    return 0;
}

Output

2 3 4

2 Slice a Vector by Logical Condition

In this example,

We create a vector named v2 containing some elements.
We define a lambda function to filter the elements based on a logical condition.
We use std::copy_if algorithm to copy elements from v2 to sliced_v2 that satisfy the condition.

C++ Program

// Slice a vector by logical condition
#include <iostream>
#include <vector>
#include <algorithm>

int main() {
    std::vector<int> v2 = {1, 2, 3, 4, 5};
    std::vector<int> sliced_v2;
    auto condition = [](int x) { return x > 2; };
    std::copy_if(v2.begin(), v2.end(), std::back_inserter(sliced_v2), condition);
    for (auto& elem : sliced_v2) {
        std::cout << elem << " ";
    }
    return 0;
}

Output

3 4 5

Summary

In this tutorial, we learned How to Slice a Vector in C++ language with well detailed examples.

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How to Slice a Vector in C++ - Step by Step Examples

How to Slice a Vector in C++ ?

Answer

✐ Examples

1 Slice a Vector by Iterator Range

C++ Program

Output

2 Slice a Vector by Logical Condition

C++ Program

Output

Summary

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