エレベーターのボタン

2007.07.25 Wed 05:28

ここのところ気持ち的に疲れていたからだろうか。アパートのエレベーターに乗り込み、間違って一階のボタンを押した。まだ自分は一階にいてこれから四階の自分の家に帰ろうとしているところだ。

一階のボタンを押すと数字の「1」が光り、「あ、間違えた」と思って指を離すとその数字の光は消えた。四階のボタンを押しなおすと、今度は指を離しても「4」は光り続けている。

この間に考えたことはふたつ。

『今の「1」の挙動はユーザーの操作が間違っていることを伝えるのに適切なものだっただろうか?今いる階のボタンを押してもそもそも光らない、という挙動はどうだ?いや、それは違うか。ボタンが光るのはユーザーの入力を受け付けたたというサインだよな。』

『今このボタンはonkeydownイベントを受けて点灯し、onkeyupイベントで消灯した。onkeydownでは問答無用で点灯し、onkeyup時にはそのボタンの示す階が現在地かどうかを判定する条件分岐があるな。』

四階についたエレベータを降りて部屋に着くまでに、自分の思考の偏向っぷりに対するおかしさと、もうちょっとがんばれるのかな、というかがんばんるしかないのかな、という諦めのような気持ちとが混ざって変な薄笑いを浮かべていた。

そういうわけでやっぱりもうちょっとがんばろうと思う。

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    posted datetime
    2007.07.25 Wed 12:06
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    美しい職業病ですね！（笑）

    「Web標準の日々」U5,かなり面白かったです。ありがとうございました。

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