pruby/kawasakirb056.ipynb

{
 "cells": [
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "#### ■属性や状態の取得"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 1,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "2018-01-24 13:34:11 +0900\n",
      "2017-03-19 06:03:39 +0900\n",
      "2017-03-19 06:01:13 +0900\n",
      "true\n",
      "true\n",
      "false\n",
      "true\n",
      "true\n",
      "\"file\"\n",
      "true\n",
      "false\n"
     ]
    },
    {
     "data": {
      "text/plain": [
       "false"
      ]
     },
     "execution_count": 1,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "fname = 'C:\\Windows\\System32\\drivers\\etc\\hosts'\n",
    "\n",
    "p File.atime(fname)\n",
    "p File.ctime(fname)\n",
    "p File.mtime(fname)\n",
    "\n",
    "p File.exist?(fname)\n",
    "\n",
    "p File.owned?(fname)\n",
    "p File.executable?(fname)\n",
    "p File.readable?(fname)\n",
    "p File.writable?(fname)\n",
    "\n",
    "p File.ftype(fname)\n",
    "p File.file?(fname)\n",
    "p File.directory?(fname)\n",
    "File.pipe?(fname)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "false\n",
      "false\n",
      "824\n",
      "false\n"
     ]
    },
    {
     "data": {
      "text/plain": [
       "#<File::Stat dev=0x2, ino=38843546786145963, mode=0100644, nlink=1, uid=0, gid=0, rdev=0x2, size=824, blksize=nil, blocks=nil, atime=2018-01-24 13:34:11 +0900, mtime=2017-03-19 06:01:13 +0900, ctime=2017-03-19 06:03:39 +0900>"
      ]
     },
     "execution_count": 2,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "p File.socket?(fname)\n",
    "p File.symlink?(fname)\n",
    "\n",
    "p File.size(fname)\n",
    "p File.zero?(fname)\n",
    "\n",
    "File.stat(fname)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "false\n",
      "true\n",
      "false\n"
     ]
    }
   ],
   "source": [
    "file = 'foo.txt'\n",
    "puts File.empty?(file)\n",
    "File.write(file, '')\n",
    "puts File.empty?(file)\n",
    "File.write(file, 'hi')\n",
    "puts File.empty?(file)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "#### ■ ファイルパスの操作"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "\"C:\\\\Windows\"\n",
      "\"notepad.exe\"\n",
      "\"notepad\"\n",
      "\".exe\"\n",
      "\"C:\\\\Windows/notepad.exe\"\n",
      "\"C:/Windows/notepad.exe\"\n",
      "\"/usr/local/bin/ruby\"\n",
      "[\"C:\\\\Windows\\\\System32\\\\etc\", \"hosts\"]\n"
     ]
    },
    {
     "data": {
      "text/plain": [
       "[\"/usr/local/bin\", \"ruby\"]"
      ]
     },
     "execution_count": 5,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "fname = 'C:\\Windows\\notepad.exe'\n",
    "\n",
    "p File.dirname(fname)\n",
    "p File.basename(fname)\n",
    "\n",
    "p File.basename(fname, '.*')\n",
    "\n",
    "p File.extname(fname)\n",
    "\n",
    "p File.join('C:\\Windows', 'notepad.exe')\n",
    "p File.join('C:','Windows', 'notepad.exe')\n",
    "p File.join('/usr/local', 'bin/ruby')\n",
    "\n",
    "p File.split('C:\\Windows\\System32\\etc\\hosts')\n",
    "File.split('/usr/local/bin/ruby')"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 6,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "#<Pathname:C:Windows/notepad.exe>"
      ]
     },
     "execution_count": 6,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "path = Pathname.new(\"C:\\Windows\") / \"notepad.exe\""
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 8,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "\"C:/Users/chezo/Documents/source/kawasakirb/meetups/pruby/fname\"\n"
     ]
    },
    {
     "data": {
      "text/plain": [
       "\"C:/Users/chezo/Documents/source/kawasakirb/meetups/pruby/fname\""
      ]
     },
     "execution_count": 8,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "p File.expand_path('fname')"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 9,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "\"C:/Users/chezo/Documents/source/kawasakirb/meetups/pruby\""
      ]
     },
     "execution_count": 9,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "File.expand_path('..', __FILE__)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 11,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "\"C:/Users/chezo\""
      ]
     },
     "execution_count": 11,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "File.expand_path('~')"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 12,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "\"C:/Users/chezo/Documents/source/kawasakirb/meetups/pruby/~\""
      ]
     },
     "execution_count": 12,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "File.absolute_path('~')"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "次回「5-7-4 Kernel.#open」から"
   ]
  }
 ],
 "metadata": {
  "kernelspec": {
   "display_name": "Ruby 2.4.1",
   "language": "ruby",
   "name": "ruby"
  },
  "language_info": {
   "file_extension": ".rb",
   "mimetype": "application/x-ruby",
   "name": "ruby",
   "version": "2.4.1"
  }
 },
 "nbformat": 4,
 "nbformat_minor": 2
}