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| { | |
| "cells": [ | |
| { | |
| "cell_type": "markdown", | |
| "metadata": { | |
| "toc": "true" | |
| }, | |
| "source": [ | |
| "# Table of Contents\n", | |
| " <p><div class=\"lev1 toc-item\"><a href=\"#Dictionaries\" data-toc-modified-id=\"Dictionaries-1\"><span class=\"toc-item-num\">1 </span>Dictionaries</a></div><div class=\"lev1 toc-item\"><a href=\"#辞書型の操作\" data-toc-modified-id=\"辞書型の操作-2\"><span class=\"toc-item-num\">2 </span>辞書型の操作</a></div>" | |
| ] | |
| }, | |
| { | |
| "cell_type": "markdown", | |
| "metadata": {}, | |
| "source": [ | |
| "# Dictionaries" | |
| ] | |
| }, | |
| { | |
| "cell_type": "code", | |
| "execution_count": 1, | |
| "metadata": { | |
| "ExecuteTime": { | |
| "end_time": "2018-02-01T09:04:40.727000Z", | |
| "start_time": "2018-02-01T00:04:39.399Z" | |
| } | |
| }, | |
| "outputs": [ | |
| { | |
| "data": { | |
| "text/plain": [ | |
| "Dict{String,Int64} with 3 entries:\n", | |
| " \"Apple\" => 1\n", | |
| " \"Orange\" => 3\n", | |
| " \"Banana\" => 2" | |
| ] | |
| }, | |
| "execution_count": 1, | |
| "metadata": {}, | |
| "output_type": "execute_result" | |
| } | |
| ], | |
| "source": [ | |
| "# 定義の仕方は以下の通り。Pythonは「:」だが、Juliaでは「=>」になる。\n", | |
| "fruits = Dict(\"Apple\" => 1, \"Banana\" => 2, \"Orange\" => 3)" | |
| ] | |
| }, | |
| { | |
| "cell_type": "code", | |
| "execution_count": 2, | |
| "metadata": { | |
| "ExecuteTime": { | |
| "end_time": "2018-02-01T09:04:40.860000Z", | |
| "start_time": "2018-02-01T00:04:39.998Z" | |
| } | |
| }, | |
| "outputs": [ | |
| { | |
| "data": { | |
| "text/plain": [ | |
| "1" | |
| ] | |
| }, | |
| "execution_count": 2, | |
| "metadata": {}, | |
| "output_type": "execute_result" | |
| } | |
| ], | |
| "source": [ | |
| "# 要素へのアクセス方法はキーを指定するだけ\n", | |
| "fruits[\"Apple\"]" | |
| ] | |
| }, | |
| { | |
| "cell_type": "code", | |
| "execution_count": 3, | |
| "metadata": { | |
| "ExecuteTime": { | |
| "end_time": "2018-02-01T09:04:41.273000Z", | |
| "start_time": "2018-02-01T00:04:40.606Z" | |
| } | |
| }, | |
| "outputs": [ | |
| { | |
| "name": "stdout", | |
| "output_type": "stream", | |
| "text": [ | |
| "Dict(\"Apple\"=>1,\"Orange\"=>3,\"Peach\"=>4,\"Banana\"=>2)\n", | |
| "3\n", | |
| "Dict(\"Apple\"=>1,\"Orange\"=>3,\"Banana\"=>2)\n" | |
| ] | |
| }, | |
| { | |
| "data": { | |
| "text/plain": [ | |
| "Dict{String,Int64} with 3 entries:\n", | |
| " \"Apple\" => 1\n", | |
| " \"Orange\" => 3\n", | |
| " \"Banana\" => 2" | |
| ] | |
| }, | |
| "execution_count": 3, | |
| "metadata": {}, | |
| "output_type": "execute_result" | |
| } | |
| ], | |
| "source": [ | |
| "# 要素の追加\n", | |
| "fruits[\"Peach\"] = 4\n", | |
| "println(fruits)\n", | |
| "\n", | |
| "# 更新\n", | |
| "fruits[\"Peach\"] = 3\n", | |
| "println(fruits[\"Peach\"])\n", | |
| "\n", | |
| "# 削除\n", | |
| "pop!(fruits, \"Peach\")\n", | |
| "println(fruits)\n", | |
| "\n", | |
| "# popでもできるが、delete!を使う方が直感的\n", | |
| "fruits[\"Peach\"] = 3\n", | |
| "delete!(fruits, \"Peach\")" | |
| ] | |
| }, | |
| { | |
| "cell_type": "code", | |
| "execution_count": 4, | |
| "metadata": { | |
| "ExecuteTime": { | |
| "end_time": "2018-02-01T09:04:42.154000Z", | |
| "start_time": "2018-02-01T00:04:41.573Z" | |
| } | |
| }, | |
| "outputs": [ | |
| { | |
| "ename": "LoadError", | |
| "evalue": "\u001b[91mKeyError: key 1 not found\u001b[39m", | |
| "output_type": "error", | |
| "traceback": [ | |
| "\u001b[91mKeyError: key 1 not found\u001b[39m", | |
| "", | |
| "Stacktrace:", | |
| " [1] \u001b[1mgetindex\u001b[22m\u001b[22m\u001b[1m(\u001b[22m\u001b[22m::Dict{String,Int64}, ::Int64\u001b[1m)\u001b[22m\u001b[22m at \u001b[1m.\\dict.jl:474\u001b[22m\u001b[22m" | |
| ] | |
| } | |
| ], | |
| "source": [ | |
| "# 辞書型は順序という概念を持っていないので、indexでアクセスはできない\n", | |
| "# 以下のようにすると、「1」というキーでアクセスしようとする\n", | |
| "fruits[1]" | |
| ] | |
| }, | |
| { | |
| "cell_type": "code", | |
| "execution_count": 5, | |
| "metadata": { | |
| "ExecuteTime": { | |
| "end_time": "2018-02-01T09:04:42.999000Z", | |
| "start_time": "2018-02-01T00:04:42.918Z" | |
| } | |
| }, | |
| "outputs": [ | |
| { | |
| "ename": "LoadError", | |
| "evalue": "\u001b[91msyntax: { } vector syntax is discontinued\u001b[39m", | |
| "output_type": "error", | |
| "traceback": [ | |
| "\u001b[91msyntax: { } vector syntax is discontinued\u001b[39m", | |
| "" | |
| ] | |
| } | |
| ], | |
| "source": [ | |
| "# ちなみにPythonみたく定義はできない\n", | |
| "a = {\"Apple\":1}" | |
| ] | |
| }, | |
| { | |
| "cell_type": "markdown", | |
| "metadata": {}, | |
| "source": [ | |
| "# 辞書型の操作" | |
| ] | |
| }, | |
| { | |
| "cell_type": "code", | |
| "execution_count": 6, | |
| "metadata": { | |
| "ExecuteTime": { | |
| "end_time": "2018-02-01T09:04:46.613000Z", | |
| "start_time": "2018-02-01T00:04:46.462Z" | |
| } | |
| }, | |
| "outputs": [ | |
| { | |
| "data": { | |
| "text/plain": [ | |
| "true" | |
| ] | |
| }, | |
| "execution_count": 6, | |
| "metadata": {}, | |
| "output_type": "execute_result" | |
| } | |
| ], | |
| "source": [ | |
| "# キーを持っているかどうかの判定\n", | |
| "haskey(fruits, \"Apple\") # true" | |
| ] | |
| }, | |
| { | |
| "cell_type": "code", | |
| "execution_count": 7, | |
| "metadata": { | |
| "ExecuteTime": { | |
| "end_time": "2018-02-01T09:04:46.663000Z", | |
| "start_time": "2018-02-01T00:04:46.639Z" | |
| } | |
| }, | |
| "outputs": [ | |
| { | |
| "name": "stdout", | |
| "output_type": "stream", | |
| "text": [ | |
| "1\n", | |
| "100\n" | |
| ] | |
| } | |
| ], | |
| "source": [ | |
| "# get(dict, key, default)で、値を取得できる。defaultは、keyがdictになかったときに返ってくる値\n", | |
| "\n", | |
| "# 以下は、1が返ってくる\n", | |
| "println(get(fruits, \"Apple\", 100))\n", | |
| "\n", | |
| "# Peachがkeyにないので、100を返す\n", | |
| "println(get(fruits, \"Peach\", 100))" | |
| ] | |
| }, | |
| { | |
| "cell_type": "code", | |
| "execution_count": 8, | |
| "metadata": { | |
| "ExecuteTime": { | |
| "end_time": "2018-02-01T09:04:46.829000Z", | |
| "start_time": "2018-02-01T00:04:46.822Z" | |
| } | |
| }, | |
| "outputs": [ | |
| { | |
| "name": "stdout", | |
| "output_type": "stream", | |
| "text": [ | |
| "3\n", | |
| "Dict(\"Apple\"=>1,\"Orange\"=>3,\"Banana\"=>2)\n" | |
| ] | |
| } | |
| ], | |
| "source": [ | |
| "# popを実行する\n", | |
| "fruits[\"Peach\"] = 3\n", | |
| "println(pop!(fruits, \"Peach\")) # Peachの値が返ってくる\n", | |
| "println(fruits) # Peachのkeyとvalueはなくなっている" | |
| ] | |
| }, | |
| { | |
| "cell_type": "code", | |
| "execution_count": 9, | |
| "metadata": { | |
| "ExecuteTime": { | |
| "end_time": "2018-02-01T09:04:47.571000Z", | |
| "start_time": "2018-02-01T00:04:47.311Z" | |
| } | |
| }, | |
| "outputs": [ | |
| { | |
| "data": { | |
| "text/plain": [ | |
| "Base.KeyIterator for a Dict{String,Int64} with 3 entries. Keys:\n", | |
| " \"Apple\"\n", | |
| " \"Orange\"\n", | |
| " \"Banana\"" | |
| ] | |
| }, | |
| "execution_count": 9, | |
| "metadata": {}, | |
| "output_type": "execute_result" | |
| } | |
| ], | |
| "source": [ | |
| "# keyの一覧を取得したいときは以下のようにしてできる。\n", | |
| "keys(fruits)" | |
| ] | |
| }, | |
| { | |
| "cell_type": "code", | |
| "execution_count": 10, | |
| "metadata": { | |
| "ExecuteTime": { | |
| "end_time": "2018-02-01T09:04:48.079000Z", | |
| "start_time": "2018-02-01T00:04:47.878Z" | |
| } | |
| }, | |
| "outputs": [ | |
| { | |
| "data": { | |
| "text/plain": [ | |
| "Base.ValueIterator for a Dict{String,Int64} with 3 entries. Values:\n", | |
| " 1\n", | |
| " 3\n", | |
| " 2" | |
| ] | |
| }, | |
| "execution_count": 10, | |
| "metadata": {}, | |
| "output_type": "execute_result" | |
| } | |
| ], | |
| "source": [ | |
| "# valueの一覧を取得したいときは以下のような感じ\n", | |
| "values(fruits)" | |
| ] | |
| }, | |
| { | |
| "cell_type": "code", | |
| "execution_count": 11, | |
| "metadata": { | |
| "ExecuteTime": { | |
| "end_time": "2018-02-01T09:04:48.760000Z", | |
| "start_time": "2018-02-01T00:04:48.718Z" | |
| } | |
| }, | |
| "outputs": [ | |
| { | |
| "name": "stdout", | |
| "output_type": "stream", | |
| "text": [ | |
| "Dict(\"Apple\"=>1,\"Peach\"=>4,\"Banana\"=>3)\n", | |
| "Dict(\"Apple\"=>1,\"Peach\"=>4,\"Banana\"=>2)\n" | |
| ] | |
| } | |
| ], | |
| "source": [ | |
| "# 複数の辞書のマージも可能\n", | |
| "a = Dict(\"Apple\" => 1, \"Banana\" => 2)\n", | |
| "b = Dict(\"Banana\" => 3, \"Peach\" => 4)\n", | |
| "\n", | |
| "# 以下の二つのBananaの値の違いに注目\n", | |
| "println(merge(a, b))\n", | |
| "println(merge(b, a))" | |
| ] | |
| } | |
| ], | |
| "metadata": { | |
| "kernelspec": { | |
| "display_name": "Julia 0.6.0", | |
| "language": "julia", | |
| "name": "julia-0.6" | |
| }, | |
| "language_info": { | |
| "file_extension": ".jl", | |
| "mimetype": "application/julia", | |
| "name": "julia", | |
| "version": "0.6.0" | |
| }, | |
| "latex_envs": { | |
| "LaTeX_envs_menu_present": true, | |
| "autocomplete": true, | |
| "bibliofile": "biblio.bib", | |
| "cite_by": "apalike", | |
| "current_citInitial": 1, | |
| "eqLabelWithNumbers": true, | |
| "eqNumInitial": 1, | |
| "hotkeys": { | |
| "equation": "Ctrl-E", | |
| "itemize": "Ctrl-I" | |
| }, | |
| "labels_anchors": false, | |
| "latex_user_defs": false, | |
| "report_style_numbering": false, | |
| "user_envs_cfg": false | |
| }, | |
| "toc": { | |
| "colors": { | |
| "hover_highlight": "#DAA520", | |
| "navigate_num": "#000000", | |
| "navigate_text": "#333333", | |
| "running_highlight": "#FF0000", | |
| "selected_highlight": "#FFD700", | |
| "sidebar_border": "#EEEEEE", | |
| "wrapper_background": "#FFFFFF" | |
| }, | |
| "moveMenuLeft": true, | |
| "nav_menu": { | |
| "height": "39px", | |
| "width": "254px" | |
| }, | |
| "navigate_menu": true, | |
| "number_sections": true, | |
| "sideBar": true, | |
| "threshold": 4, | |
| "toc_cell": true, | |
| "toc_section_display": "block", | |
| "toc_window_display": true, | |
| "widenNotebook": false | |
| } | |
| }, | |
| "nbformat": 4, | |
| "nbformat_minor": 2 | |
| } |
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