Complete text -- "キャレットとチルダとオーバーバー"

30 July

キャレットとチルダとオーバーバー

 授業の復習用の練習問題をネットで公開して、学生に知らせています。URLは、
http://www.le.chiba-u.ac.jp/~ishii/i/xxxx.html
とかです。
# /i/は携帯でも閲覧可能にしているからです。

 で、今頃になって(今度の火曜日が期末テスト)、上記頁がみれないとのメールがきました。
# 授業で毎回見られない人はいないかときいていたので、そのこと自体も変なのですが。これはおいておいて。


 理由は簡単で〜(チルダ)ではなく、^(キャレット)になっていたからです。
#あえて全角にしています。
 インターネットを使うという講習で、日本語キーボードを使用するとき、かならず教えないといけないと思われるのが、チルダの入力方法です。だって、JISキーボード配列にはチルダがありませんから。一応、0のキーの上段に〜があるのですが、これは冗談のようでして、チルダは入力できないのです。
 JISキーボードでは、^(キャレット)の上段に表記してある ̄(オーバーバー)を入力すると、チルダが入力されるのです。これも冗談みたいな話です。昔々のアホな人たちが囲い込み政策(JIS仕様でないと公的機関に納品できなかったりしたらしい)をした悪影響の一つでしょう。
#個人的には、欧文タイプにはASCII配列のほうに合理性があると思うのですが、慣れの問題かもしれません。それでも、JIS配列では記号入力は不便な気がします。ついでにいうと、右手薬指が不自由なので、Pのキーより右側のキーをうまく打てません。なので、よけいそう感じるのかもしれません。そのため、ダイアモンドカーソルやctrl+hなどが使用できないと不便です。

この問題は、unicodeにも悪影響をおよぼしているようで、半角のチルダを勝手に半角のオーバーバーへ書き換えてしまうソフトもあるようです。
#内部処理unicode、見た目はShift-JISというWindows系OSの固有の問題かもしれません。

 でも、上記メールの学生は、チルダが打てないのか、あるいは、友達から教えてもらったときに、間違ったのでしょう。それとも、shiftキーを押し忘れたのでしょうか?
13:29:04 | dolus | | TrackBacks
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