From: Albert Schlef <albertschlef@...>
Date: 2008-05-01T04:10:17+09:00
Subject: Re: Array#first is not Array#

Fredrik wrote;
>
> But I understand now that Array#first is not there for my coding
> convenience but rather for computational speed.

I'm using some other scripting language (PHP), and when it becomes known 
that method A to do something is faster than method B to do something, 
everybody turns to use method A no matter how ugly it looks. (When I say 
"method" I don't mean the object orient meaning. I simply mean "way".)

Now,

If #first was slower than #[0], _nobody_ would have used it!
Having #first is nice. It has merit (clarity). So the only way to have 
it and have people use it is not to have it slower than #[0].

So on the contrary: #first is there for your convenient, not for 
computational speed.
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