Re: hpairs?

[Steve Litt <slitt@...>]

On Tuesday 28 December 2010 07:11:30 Dirk Laurie wrote:
> On Tue, Dec 28, 2010 at 01:17:31PM +0200, Axel Kittenberger wrote:
> > Would'nt it sufficide in the first part to increase just an integer
> > instead? ---
> > local n = 0
> > for i, _ in ipairs(t) do
> >     n = i
> > end
> >
> > for k, v in pairs(t) do
> >    if type(k) ~= "number" or k<1 or k>n then
> >       --- someting
> >   end
> > end
> 
> No.
> 
> t={1,2}; t[1.5]=1.5

Dirk,

I think this works to deliver everything except what's delivered by ipairs():

#!/usr/bin/lua 

local arr={"one", "two", "three"}

arr[4] = "four"
arr[1.5] = "one point five"
arr["steve"] = "Litt"

for k, v in pairs(arr) do
	local skip = true
	if type(k) == "number" then
		local w, f = math.modf(k)
		if f ~= 0 then skip = false end
	else
		skip = false
	end
	if not skip then
		print(k)
		print(v)
		print("")
	end
end

I'm sure the preceding can be cleaned up a lot. Obviously, I wrote the 
preceding with a C/Perl accent, but you get the idea.

HTH,

SteveT

Steve Litt
Recession Relief Package
http://www.recession-relief.US
Twitter: http://www.twitter.com/stevelitt