feat: add sorted linear finder

QVectorSearch/mainwindow.cpp

@@ -5,6 +5,7 @@
 #include "grouped_finder.h"
 #include "linear_finder.h"
 #include "parallel_finder.h"
+#include "sorted_linear_finder.h"
 #include "timer.h"
 #include "tree_finder.h"
 #include "word_list_generator.h"
@@ -26,6 +27,7 @@ MainWindow::~MainWindow() { delete ui; }
 
 void MainWindow::setupAlgorithmSelector() {
   search_algorithms_.appendRow(new QStandardItem("Linear search"));
+  search_algorithms_.appendRow(new QStandardItem("Sorted linear search"));
   search_algorithms_.appendRow(new QStandardItem("Parallel search"));
   search_algorithms_.appendRow(new QStandardItem("Tree search"));
   search_algorithms_.appendRow(new QStandardItem("Grouped search"));
@@ -69,12 +71,15 @@ void MainWindow::createSelectedFinder() {
     finder_ = std::make_unique<LinearFinder>(word_list_);
     break;
   case 1:
-    finder_ = std::make_unique<ParallelFinder>(word_list_);
+    finder_ = std::make_unique<SortedLinearFinder>(word_list_);
     break;
   case 2:
-    finder_ = std::make_unique<TreeFinder>(word_list_);
+    finder_ = std::make_unique<ParallelFinder>(word_list_);
     break;
   case 3:
+    finder_ = std::make_unique<TreeFinder>(word_list_);
+    break;
+  case 4:
     finder_ = std::make_unique<GroupedFinder>(word_list_);
     break;
   }

lib_vector_search/CMakeLists.txt

@@ -13,6 +13,8 @@ add_library(
   include/timer.h
   src/linear_finder.cpp
   include/linear_finder.h
+  src/sorted_linear_finder.cpp
+  include/sorted_linear_finder.h
   src/parallel_finder.cpp
   include/parallel_finder.h
   src/tree_finder.cpp

lib_vector_search/include/sorted_linear_finder.h

@@ -0,0 +1,16 @@
+#pragma once
+
+#include "finder.h"
+
+#include <vector>
+
+class SortedLinearFinder : public Finder {
+private:
+  std::vector<const std::string *> word_list_;
+
+public:
+  SortedLinearFinder(const std::vector<std::string> &word_list);
+
+  std::forward_list<const std::string *>
+  find_prefix(std::string_view search_term) const override;
+};

lib_vector_search/src/sorted_linear_finder.cpp

@@ -0,0 +1,32 @@
+#include "sorted_linear_finder.h"
+
+#include <algorithm>
+#include <iterator>
+
+using std::vector, std::forward_list, std::string, std::string_view;
+
+SortedLinearFinder::SortedLinearFinder(const vector<string> &word_list) {
+  std::transform(word_list.cbegin(), word_list.cend(),
+                 std::back_inserter(word_list_),
+                 [](const string &word) { return &word; });
+
+  std::sort(
+      word_list_.begin(), word_list_.end(),
+      [](const string *left, const string *right) { return *left < *right; });
+}
+forward_list<const string *>
+SortedLinearFinder::find_prefix(string_view search_term) const {
+  forward_list<const string *> matching_words;
+
+  bool in_range = false;
+  for (const auto *word : word_list_) {
+    if (word->starts_with(search_term)) {
+      matching_words.push_front(word);
+      in_range = true;
+    } else if (in_range) {
+      break;
+    }
+  }
+
+  return matching_words;
+}

vector_search_cli/main.cpp

@@ -1,6 +1,7 @@
 #include "grouped_finder.h"
 #include "linear_finder.h"
 #include "parallel_finder.h"
+#include "sorted_linear_finder.h"
 #include "timer.h"
 #include "tree_finder.h"
 #include "word_list_generator.h"
@@ -10,11 +11,11 @@
 
 using std::string, std::string_view, std::vector, std::cout, std::endl;
 
-vector<string> generate_word_list() {
-  cout << "\ngenerating word list" << endl;
+vector<string> generate_word_list(size_t size_factor = 1) {
+  cout << "\ngenerating word list (" << size_factor << "x)" << endl;
 
   Timer generator_timer;
-  auto word_list = WordListGenerator::generate(5);
+  auto word_list = WordListGenerator::generate(size_factor);
   generator_timer.stop();
 
   cout << "word list generator took " << generator_timer << endl;
@@ -43,15 +44,32 @@ void test_finder(Finder &finder, std::string_view name) {
 void test_linear_finder(const vector<string> &word_list) {
   cout << "\nrunning linear finder" << endl;
 
+  Timer constructor_timer;
   LinearFinder linear_finder(word_list);
+  constructor_timer.stop();
+  cout << "linear finder constructor took " << constructor_timer << endl;
 
   test_finder(linear_finder, "linear finder");
 }
 
+void test_sorted_linear_finder(const vector<string> &word_list) {
+  cout << "\nrunning sorted linear finder" << endl;
+
+  Timer constructor_timer;
+  SortedLinearFinder sorted_linear_finder(word_list);
+  constructor_timer.stop();
+  cout << "sorted linear finder constructor took " << constructor_timer << endl;
+
+  test_finder(sorted_linear_finder, "sorted linear finder");
+}
+
 void test_parallel_finder(const vector<string> &word_list) {
   cout << "\nrunning parallel finder" << endl;
 
+  Timer constructor_timer;
   ParallelFinder parallel_finder(word_list);
+  constructor_timer.stop();
+  cout << "linear finder constructor took " << constructor_timer << endl;
 
   test_finder(parallel_finder, "parallel finder");
 }
@@ -81,9 +99,10 @@ void test_grouped_finder(const vector<string> &word_list) {
 int main(int argc, char *argv[]) {
   cout << "\n== VectorSearch ==" << endl;
 
-  auto word_list = generate_word_list();
+  auto word_list = generate_word_list(5);
 
   test_linear_finder(word_list);
+  test_sorted_linear_finder(word_list);
   test_parallel_finder(word_list);
   test_tree_finder(word_list);
   test_grouped_finder(word_list);