Re: Selenophobia
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- Subject: Re: Selenophobia
- From: "Joseph Manning" <manning@...>
- Date: 2017年3月28日 10:27:45 +0100
On Tue, March 28, 2017 07:14, Ahmed Charles wrote:
>> I find this amusing because I've never written "len - 1" in a loop, I've
>> only ever written "!= len".
Ahmed,
You're amused? I'm confused. This list is about Lua.
In Lua, the (numeric) 'for' loop takes explicit bounds,
such as
for i = 1, 10 do
or, when iterating over a sequence,
for i = 1, #t do
(yes, there are cases where this is preferable to 'ipairs').
This, to my mind, is distinctly better than having to write
for i = 0, #t - 1 do
Several other languages (Pascal, Modula-2/3, Fortran, ... )
also have 'for' loops with explicit bounds.
In Lua, and all of these languages, your '!= len' approach
is simply not applicable. Please correct me if I'm wrong,
but 'len - 1' would be unavoidable if 0-based indexing were
to be used in any such language.
I'm very happy with Lua's approach.
Joseph
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Joseph Manning / Computer Science / UCC Cork Ireland / manning@cs.ucc.ie
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