Begin implementing grid combinations

src/Platform/GridData.cc

@@ -0,0 +1,67 @@
+#include "GridData.h"
+#include <iostream>
+
+namespace platform {
+    GridData::GridData()
+    {
+        auto boostaode = 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;
+        grid["BoostAODE"] = boostaode;
+    }
+    int GridData::computeNumCombinations(const json& line)
+    {
+        int numCombinations = 1;
+        for (const auto& item : line) {
+            for (const auto& hyperparam : item.items()) {
+                numCombinations *= item.size();
+            }
+        }
+        return numCombinations;
+    }
+    std::vector<json> GridData::doCombination(const std::string& model)
+    {
+        int numTotal = 0;
+        for (const auto& item : grid[model]) {
+            numTotal += computeNumCombinations(item);
+        }
+        auto result = std::vector<json>(numTotal);
+        int base = 0;
+        for (const auto& item : grid[model]) {
+            int numCombinations = computeNumCombinations(item);
+            int line = 0;
+            for (const auto& hyperparam : item.items()) {
+                int numValues = hyperparam.value().size();
+                for (const auto& value : hyperparam.value()) {
+                    for (int i = 0; i < numCombinations / numValues; i++) {
+                        result[base + line++][hyperparam.key()] = value;
+                        //std::cout << "line=" << base + line << " " << hyperparam.key() << "=" << value << std::endl;
+                    }
+                }
+            }
+            base += numCombinations;
+        }
+        for (const auto& item : result) {
+            std::cout << item.dump() << std::endl;
+        }
+        return result;
+    }
+} /* namespace platform */