Generate combinations sample

src/Platform/combinations.cc

@@ -0,0 +1,57 @@
+#include <iostream>
+#include <vector>
+#include <nlohmann/json.hpp>
+
+using json = nlohmann::json;
+
+json generateCombinations(json::iterator index, const json::iterator last, std::vector<json>& output, json currentCombination)
+{
+    if (index == last) {
+        // If we reached the end of input, store the current combination
+        output.push_back(currentCombination);
+        return  currentCombination;
+    }
+    const auto& key = index.key();
+    const auto& values = index.value();
+    for (const auto& value : values) {
+        auto combination = currentCombination;
+        combination[key] = value;
+        json::iterator nextIndex = index;
+        generateCombinations(++nextIndex, last, output, combination);
+    }
+    return currentCombination;
+}
+
+int main()
+{
+    json input = R"(
+        [
+            {
+                "convergence": [true, false],
+                "ascending": [true, false],
+                "repeatSparent": [true, false],
+                "select_features": ["CFS", "FCBF"],
+                "tolerance": [0, 3, 5],
+                "threshold": [1e-7]
+            },
+            {
+                "convergence": [true, false],
+                "ascending": [true, false],
+                "repeatSparent": [true, false],
+                "select_features": ["IWSS"],
+                "tolerance": [0, 3, 5],
+                "threshold": [0.5]
+            }
+        ]
+    )"_json;
+    auto output = std::vector<json>();
+    for (json line : input) {
+        generateCombinations(line.begin(), line.end(), output, json({}));
+    }
+    // Print the generated combinations
+    int i = 0;
+    for (const auto& item : output) {
+        std::cout << i++ << " " << item.dump() << std::endl;
+    }
+    return 0;
+}