{
 "cells": [
  {
   "cell_type": "code",
   "execution_count": 1,
   "metadata": {},
   "outputs": [],
   "source": [
    "type TrieMap struct {\n",
    "    node  map[byte]*TrieMap\n",
    "    empty bool\n",
    "    value string\n",
    "}\n",
    "\n",
    "func (tm *TrieMap) add(key, value string) {\n",
    "    cur := tm\n",
    "    for _, c := range []byte(key) {\n",
    "        if _, ok := cur.node[c]; ! ok {\n",
    "            cur.node[c] = &TrieMap{make(map[byte]*TrieMap), true, \"\"}\n",
    "        }\n",
    "        cur = cur.node[c]\n",
    "    }\n",
    "    cur.empty = false\n",
    "    cur.value = value\n",
    "}\n",
    "\n",
    "func (tm *TrieMap) query(key string) (string, bool) {\n",
    "    cur := tm\n",
    "    for _, c := range []byte(key) {\n",
    "        val, ok := cur.node[c]\n",
    "        if !ok {\n",
    "            return \"\", false\n",
    "        }\n",
    "        cur = val\n",
    "    }\n",
    "    return cur.value, !cur.empty\n",
    "}"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {},
   "outputs": [],
   "source": [
    "func NewTrieMap(keys, values []string) *TrieMap {\n",
    "    tm := &TrieMap{make(map[byte]*TrieMap), true, \"\"}\n",
    "    for i, key := range keys {\n",
    "        tm.add(key, values[i])\n",
    "    }\n",
    "    return tm\n",
    "}"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "metadata": {},
   "outputs": [],
   "source": [
    "keys := []string{\"hello\", \"there\", \"the\"}\n",
    "values := []string{\"1\", \"2\", \"3\"}\n",
    "tm := NewTrieMap(keys, values)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "1\n",
      "true\n"
     ]
    }
   ],
   "source": [
    "tm.query(\"hello\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "\n",
      "false\n"
     ]
    }
   ],
   "source": [
    "tm.query(\"hello there\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 6,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "2\n",
      "true\n"
     ]
    }
   ],
   "source": [
    "tm.query(\"there\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 7,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "\n",
      "false\n"
     ]
    }
   ],
   "source": [
    "tm.query(\"ther\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 8,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "3\n",
      "true\n"
     ]
    }
   ],
   "source": [
    "tm.query(\"the\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 9,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "\n",
      "false\n"
     ]
    }
   ],
   "source": [
    "tm.query(\"\")"
   ]
  }
 ],
 "metadata": {
  "kernelspec": {
   "display_name": "Go (lgo)",
   "language": "go",
   "name": "lgo"
  },
  "language_info": {
   "file_extension": "",
   "mimetype": "",
   "name": "go",
   "version": ""
  }
 },
 "nbformat": 4,
 "nbformat_minor": 2
}