notebooks/json.ipynb

{
 "cells": [
  {
   "cell_type": "code",
   "execution_count": 1,
   "metadata": {},
   "outputs": [],
   "source": [
    "#include <iostream>\n",
    "\n",
    "#include <nlohmann/json.hpp>\n",
    "\n",
    "#include \"xtensor/xio.hpp\"\n",
    "#include \"xtensor/xjson.hpp\"\n",
    "#include \"xtensor/xarray.hpp\"\n",
    "#include \"xtensor/xview.hpp\""
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "[[[1.0,2.0],[3.0,4.0]],[[1.0,2.0],[3.0,4.0]]]\n"
     ]
    }
   ],
   "source": [
    "xt::xarray<double> t = \n",
    "  {{{1, 2},\n",
    "    {3, 4}},\n",
    "   {{1, 2},\n",
    "    {3, 4}}};\n",
    "\n",
    "nlohmann::json jl = t;\n",
    "std::cout << jl.dump() << std::endl;"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "{{{ 1.,  2.},\n",
      "  { 3.,  4.}},\n",
      " {{ 1.,  2.},\n",
      "  { 3.,  4.}}}\n"
     ]
    }
   ],
   "source": [
    "auto d = jl.get<xt::xarray<double>>();\n",
    "std::cout << d << std::endl;"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "metadata": {},
   "outputs": [],
   "source": [
    "nlohmann::json j = {std::vector<double>{10, 10}, std::vector<double>{10, 10}};"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "[[10.0,10.0],[10.0,10.0]]"
     ]
    }
   ],
   "source": [
    "std::cout << j;"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 6,
   "metadata": {},
   "outputs": [],
   "source": [
    "auto v = xt::view(t, 0);"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 7,
   "metadata": {},
   "outputs": [
    {
     "ename": "Standard Exception",
     "evalue": "[json.exception.type_error.302] type must be number, but is array",
     "output_type": "error",
     "traceback": [
      "Standard Exception: [json.exception.type_error.302] type must be number, but is array"
     ]
    }
   ],
   "source": [
    "v = j;"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 8,
   "metadata": {},
   "outputs": [],
   "source": [
    "from_json(j, v);"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 9,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "{{{ 10.,  10.},\n",
      "  { 10.,  10.}},\n",
      " {{  1.,   2.},\n",
      "  {  3.,   4.}}}"
     ]
    }
   ],
   "source": [
    "std::cout << t;"
   ]
  }
 ],
 "metadata": {
  "kernelspec": {
   "display_name": "C++14",
   "language": "C++14",
   "name": "xeus-cling-cpp14"
  },
  "language_info": {
   "codemirror_mode": "text/x-c++src",
   "file_extension": ".cpp",
   "mimetype": "text/x-c++src",
   "name": "c++",
   "version": "14"
  }
 },
 "nbformat": 4,
 "nbformat_minor": 1
}