Lambda Expression (diperkenalkan sejak C++11) memungkinkan pembuatan fungsi inline anonim tanpa nama langsung di tempat ia dibutuhkan.
Poin Kunci Materi:
- Capture Clause
[]: Mengontrol variabel lingkungan luar yang bisa diakses: [=] (by-value), [&] (by-reference). - Parameter List
(): Argumen yang diterima layaknya fungsi standar. - Integrasi Algoritma: Sering dipasangkan dengan
std::sort, std::find_if, dan std::for_each untuk pemrosesan koleksi data modern.
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<span style="margin-left: 8px; font-weight: bold; color: #38bdf8;">⚙️ C++ Lambda - Skillance C++20</span>
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<span class="comment">// Skrip C++20 - Skillance Academy Indonesia</span>
#include <iostream>
#include <vector>
#include <algorithm>
int main() {
// Lambda sederhana: [](params) -> return_type { body }
auto sapa = [](const std::string& nama) {
return "Halo, " + nama + " dari Lambda!";
};
std::cout << sapa("Rendi") << "\n";
// Lambda dengan capture list [&] dan std::for_each
std::vector<int> angka = {1, 2, 3, 4};
int total = 0;
std::for_each(angka.begin(), angka.end(), [&total](int n) {
total += n;
});
std::cout << "Total Jumlah Vektor via Lambda: " << total << std::endl;
return 0;
}
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<div style="color: #64748b; margin-bottom: 6px;">[Terminal Output] > g++ -std=c++20 main.cpp -o main && ./main</div>
<div style="color: #4ade80; font-weight: bold;">Halo, Rendi dari Lambda!<br>Total Jumlah Vektor via Lambda: 10</div>
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Coba Sendiri (Try it Yourself) »