February 2013
Intermediate to advanced
380 pages
7h 45m
Japanese
Content preview from Nodeクックブック
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57
3
章
データのシリアル化
はじめに
サードパーティの開発者にデータへのアクセスを与えたい場合、開発者が理解できるフォーマッ
トにシリアル化した上でデータを提供することができます。本章では、そのような場合によく利用
される
JSON
および
XML
データフォーマットへのシリアル化について紹介します。
レシピ
3.1
オブジェクトを
JSON
に変換する
JSON
（
JavaScript Object Notation
）は、
JavaScript
のオブジェクトとほぼ共通した記法を持っ
ています。
JavaScript
の厳密なサブセットではないものの、
JavaScript
ととても密接な関係にあり
ます。
本レシピでは、
JSON
操作の基礎を学びます。あらかじめ準備したオブジェクトを外部モジュー
ルとして読み込み、
JSON.stringify
でその内容をシリアル化して文字列を操作し、
JSON.parse
で
またオブジェクトに戻します。
準備
profiles.js
と
json_and_back.js
という
2
つのファイルを用意しておきます。
手順
まずデータオブジェクトを用意します。後でこのオブジェクトを
JSON
形式にシリアル化しま
す。
profiles.js
module.exports = {
ryan: {
name: "Ryan Dahl",
irc: "ryah",
twitter: "ryah",
58
3 章 データのシリアル化
profiles.js（続き）
github: "ry",
location: "San Francisco, ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.