February 2013
Intermediate to advanced
380 pages
7h 45m
Japanese
Content preview from Nodeクックブック
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66
3 章 データのシリアル化
traverse
関数は、
forEach
ループを使って、
obj
に渡されたオブジェクトのキー（
Object.
keys()
）を走査し、それぞれのキーを
forEach
のコールバック関数に渡します。
コールバックではキーを名称として開始タグと終了タグを作成し、開始タグを
xml
変数に追記し
ます。次に、キーに対応する値が文字列かどうかを判定して、
isTxt
変数に
true
もしくは
false
を設定します（ここでは、オブジェクトと判定されない場合はテキストであると判定します）。
isTxt
が
true
の場合は、値をテキストノードとして出力して、終了タグを付与して
traverse
関
数を終了します。
isTxt
が
false
の場合はその値はオブジェクトなので、子ノードを生成します。
xml
変数に改行を追記して、値のオブジェクトをそのまま
traverse
関数に渡して再帰させます。
再帰した
traverse
関数が
xml
変数に適切な値を書き終えた後、終了タグを付与します。
traverse
関数から抜けると、
xml
変数の最後にルートノードの終了タグを付与して、
XML
形式
に変換された文字列を持つ
xml
変数を返します。
XML
形式から
JavaScript
オブジェクトに変換する際に複雑になりがちな部分のルールを決めて
おくことで、
xml2js
モジュールをより有効に利用することができます。また、複雑な
JavaScript
オブジェクトを、正しいフォーマットの
XML
に変換するようにコードを拡張することもできま ...
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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.